More from EW
1 of 25
''During a boxing match where Starbuck and Apollo are beating the crap out of each other, we get to see them in love for a brief moment on New Caprica. Then Starbuck, of course, gets scared, runs back to Anders, and fraks up any chance of her happiness. It's not 100 percent flashback episode, but seeing Lee profess his love for her for all the gods to hear packs a big punch.'' —Anne Marie
''One of the eps that illustrates perfectly the power of that show: with none of its CGI battles, no spaceships, no apocalyptic stakes, BSG can deliver absolutely captivating TV with just a handful of beautifully flawed characters hitting each other for an hour, to a heart-wrenching, hypnotic score.'' — Ted
2 of 25
''Out of Gas''
''The touching scenes showing how the Serenity family came together, framed by the pathos of present-day Mal preparing to go down with his ship, never fails to get me a little teary-eyed. And while most flashback episodes tackle two distinct time periods, ''Firefly'' threw in a third ''near-present'' timeline, just to show it could.'' — Bethany
''All the episodes were great, but this one gave us a quiet story of how Mal found his beloved band of misfits. It is haunting, sorrowful, and emotional — a rare, serious moment in an often jovial series.'' — Emily
3 of 25
BUFFY THE VAMPIRE SLAYER,
''Fool for Love''
''A wonderful episode that got me invested in Spike — it moved him from amusing former badass to sincere character with depth. Not just a great episode in itself, but crucial to the rest of Buffy. And its Angel companion 'Darla' is wonderful as well.'' — R
''It depicted Buffy struggling with her mortality while finally showing an important element of Spike's backstory — his defeat of two previous slayers.'' — Chris
4 of 25
WILL & GRACE,
''Lows in the Mid-Eighties''
''This was the episode where Will and Grace were supposed to have sex over Thanksgiving in 1985, but he decided that it would be a better idea (and much funnier) to come out of the closet instead. Oh, that and Karen turning away Martina Navratilova's advances! — Ian
''CLASSIC W&G. I mean, just the hairstyles are great: Karen's super-bangs, Will's mullet, Grace's awesome/horrible perm? and in addition, we get to see Karen meeting and hiring Rosie (''You wanna come work for me?'' ''Okay!''), and a guest spot from Martina Navratilova (playing herself as one of Karen's jilted lovers)! And the framing device with the girl who doesn't realize her dancer boyfriend is gay is hilarious as well.'' — denny
5 of 25
'''Walkabout' is maybe the most heart wrenching and perfect balance of island intrigue and character enlightenment — discovering Locke was wheelchair bound and pathetic in the real world, only to be truly himself on an island everyone else wants off of, was a touch of genius, and it happened IN THE SHOW'S FOURTH EPISODE!!'' — Derek
'''Walkabout' made me drop my jaw on several occasions. It not only created so many delicious questions to answer, but helped us understand a character intimately well. 'Don't tell me what I can't do,' also became ingrained as a catch phrase.'' — Christopher
''Locke's expression when he realizes he can move his toe is priceless. It was touching, mystical, creepy and began many a Lost fans obsession with the story.'' — levelheaded
6 of 25
''The One With the Prom Video''
''The prom episode! Where Ross was so excited to take Rachel to the prom and then her date showed up? The look on his face on the videotape and Rachel realizing how much he loved her even then was PRICELESS.'' — Stacy
''Courteney Cox in a fat suit + Jennifer Aniston with that nose + David Schwimmer with that 'Jew-fro' = instant TV classic. Not to mention the fact that it was the episode where Ross and Rachel finally got together and made the entire TV universe melt, they were so happy...'' — Rebecca
7 of 25
''A Very Supernatural Christmas''
''An awesome episode that gave us great character building moments, such as Sam's growing distrust for his father and Dean's constant defense of him, that follow the boys all the way to adulthood. Add in an amulet origin story, gas station gift giving, and the goriest Christmas ever, and you get one of the best episodes in the series.'' — Lauren
''Definitely this one? it makes me cry!'' — Rowena
''It was a very poignant episode that made fantastic use of those flashbacks to develop the characters and create a memorable ending. Utterly heart-breaking without being sappy — loved it!'' — Cy
8 of 25
''The flashback episode from Grey's Anatomy this season was probably one of the best of the season: Bailey comes into her own as she ditches the fish persona and becomes a shark, Alex gets his groove back after taking unearned credit for the heart in the elevator incident, and the biggest bombshell of the night, Ellis Grey influenced the Chief into his alcoholic ways? Priceless television!'' — Mike
''The one where Derek restores the hospital lecture series, and Richard, Bailey and Callie present to the group pivotal surgical cases from their pasts.'' — Chris G
''A very cool episode! I loved Bailey in her braids!'' — Liza
9 of 25
'The rest of the series may be lackluster, but that's one of the best 'origin story' episodes for television ever put on film.'' — Minutiae
10 of 25
''?To Save Us All From Satan's Power''
''They put hair back on Tony's head, put O.J. on the TV in the background, hired Jason Cerbone's little brother to play a younger Jason Cerbone, and basically convinced you you were watching life as usual five years earlier. I can never recall an episode that so thoroughly had the feeling of the past in these people's lives.'' — Ethan
11 of 25
''Flashed back to the first day at The Barn, shows Vic putting together the strike team and reveals that that was when/how the strike team began cutting corners to take down the scum in Farmington!!'' — Kg
''The episode in the second season of The Shield makes for a great flashback episode that you never see coming, yet serves the story of that series in so many ways. Plus, the title is genius.'' — Soul Bro Ryu
12 of 25
''Home from the Sea''
''On the 4th of July, Magnum is out surf skiing — and gets knocked off. Unable to reach the ski, he is forced to tread water until help arrives. He flashes back to when he was a boy waiting for his father to return from Korea. At the time he was trying to tread water for an hour to impress his dad.'' — heej
13 of 25
''He gives a class and then suddenly we go back in time and we see him diagnosing himself. We also meet Stacy for the first time and we get to see a whole different House in a relationship. BEST FLASHBACK EVER.'' — manda
''Flashback to three unrelated medical cases. Insight into how House got his limp, under the guise of teaching a class. Brilliant imagery with shots of the lecture hall progressively filling up with not just students, but professors and other curious doctors. House also solves the case of the perpetually sick professor.'' — drowsybrowser
''Granted, you don't know it's a flashback episode until halfway through, but then it turns from a fun, wacky episode into something unexpectedly poignant.'' — J.
14 of 25
''Dear Emily and Richard''
''It was a great look at teen Lorelai from pregnancy to runaway, to see her relationship with her parents back then, and how it is in the present. Can't forget the look on Emily's (Kelly Bishop) face when she read her daughter's goodbye note. Breaks your heart.'' — Vicki
15 of 25
''Coming off a frustrating hiatus, Fringe returned with an amazing flashback episode that not only gave us a glimpse into the man that Walter Bishop was before the institution, but tied in almost every thread of story since the beginning of the show. And brilliantly, I might add. Aside from the amazing story line, and heart-wrenching (and Emmy-worthy) performance by John Noble (Walter Bishop), the director zapped us back to the '80s and had fun doing so. The main title screen showed Fringe in a very '80s font. The music, as well, was changed into a fun synthesized version? If this isn't on the ''Best Flashback Episode'' list, I swear I'll kick a puppy.'' — Mike Beck
16 of 25
''It's about how Mulder meets the Lone Gunmen, and features, in no particular order, '80s cell phones, unfortunate hair cuts, Dungeons and Dragons, and Richard Belzer. It's wonderful.'' — Druluci
17 of 25
HOW I MET YOUR MOTHER,
''There are so many great ones to choose from, it's nearly impossible to pick just one but I'll give it a try. I love the episode with Barney's lovelorn VHS tape serenade to his girlfriend Shannon. Granola Barney with a soul patch and a ponytail should be enough to make the list with no other justification needed whatsoever, but it also worked because the viewer finally got to see what made Barney the suited-up Casanova he is.'' — Randi
18 of 25
''Luck of the Fryish''
''As crazy as the show is and as much as they make Fry out to be a loser, there were a few episodes in which the writers actually made you remember that Fry left a whole world behind and that his family had to deal with the pain of not knowing where he was for their whole lives. Futurama arguably did emotion better than The Simpsons.'' — Fatima
19 of 25
''Allison Rolen Got Married ''
''Allison must deal with her growing gifts just as she and Joe are about to exchange vows. The scenes with her struggling to come to terms with her dreams and visions are beautifully done, esp. when the ghost of her grandmother is there giving her advice. And the scenes with the killer attacking the young girls were so creepy. But the emotional impact of it was the best, when her future dreams reveal a tragedy that tears her family apart and she must make a choice to try and prevent it from happening. Plus the scene when she begs Joe's forgiveness and asks him to marry her is one of the most romantic scenes ever done.'' — Dawn
20 of 25
''The Road Not Taken, Part 1''
''How about the Taxi episode in which we see Rev. Jim (Christopher Lloyd) as a straight college student rooming with a very young Tom Hanks. By the end of the hysterical episode we see how Jim is transformed to his current, drug-addled self.'' — jimmyd
''It showed how the Rev. Jim was actually once an incredibly uptight Harvard student, but one 'funny brownie' resulted in an instantaneous transformation into his counter-culture drugged-out hippie character.'' — Flyer
21 of 25
''I Married Marge''
''The story of how Homer and Marge got married, Homer started working at the plant, and Bart's birth.'' — Brian
'''Those were idealistic days... The candidacy of John Anderson, the rise of Supertramp, it was an exciting time to be young...''' — heej
22 of 25
''Time Heals, Part 1 and 2''
''Voted one of TV Guide's top 100 episodes of all time. An amazing tapestry of the hospital and its staff over 50 years of history tied together while researching a family illness. Terrific guest actors Edward Herrmann and James Stephens. You even get to see the series' doctors in 1965 and 1975.'' — Dr. Fiscus
'''Time Heals' was the first episode of an hour drama that made me see the creative possibilities of a television show. It inspired a lifelong love of writing and watching.'' — mpberry
23 of 25
THE GOLDEN GIRLS,
''The Way We Met''
''They reflected on how they met each other. The episode ended with one of Rose's best St. Olaf anecdotes about The Great Herring War, and thus the tradition of cheesecake was born.?and people wonder why Betty White is such a phenom?please isn't it obvious.'' — pie thrower
24 of 25
''The Menagerie, Part I and II''
''Absolutely brilliant adaptation of what was the original pilot, 'The Cage.' That pilot, with Captain Pike as the Enterprise's captain, not Captain Kirk, was rejected by NBC as being too cerebral. In an unusual move, NBC commissioned a second pilot, which was accepted. When Star Trek started running dangerously behind schedule on production time, Gene Roddenberry took the unused 'Cage' footage and worked it into a new, two-part episode. Spock apparently mutinies, and undergoes a court martial trial. The pilot footage is woven into the new plot as flashbacks to explain his actions. The episode won a Hugo Award.'' — PL
25 of 25
THE WEST WING,
''This was the Season 2 finale which was peppered with flashbacks to Bartlet's youth and the beginning of his relationship with Mrs. Landingham. I get chills every time.'' — Scott
''Seeing what shaped young Jed Bartlett early on. Learning that the relationship between Jed & Mrs. Landingham really was more than long-time colleagues or friends, that they really were family to each other despite no shared blood.'' — Swerds
'' The present-day parts of the episode are better known (Bartlet cursing out God, in Latin, in the National Cathedral), but it's the flashbacks that make the episode.'' — Maddi
''Still get chills watching it.'' — Isaac