After taking a hiatus four months ago, NBC's hit about power struggles in a powerless society will light up screens once again starting March 25 at 10 p.m. Before the new episodes begin, refresh your memory — and get some scoop on what's in store — with our handy primer.

By Sandra Gonzalez
March 22, 2013 at 04:00 AM EDT

? Where we left off

Charlie (Tracy Spiridakos) and Miles (Billy Burke) spent much of the first half of the season tracking down Charlie’s brother, Danny (Graham Rogers). The twosome finally found him — with his and Charlie’s mother, Rachel (Elizabeth Mitchell) — and helped them escape the compound of merciless dictator Monroe (David Lyons). The one problem? Monroe now possesses an all-important power amplifier and can fire up heavy-duty toys (like helicopters and Humvees!), better equipping him for the battles for (figurative and literal) power that are sure to come.

? When we return

The first half of the season was meant to act as a ”prologue to a much larger story,” explains creator/exec producer Eric Kripke, but now that the introductions are over, ”[in] the second half of the season, this war really begins.” In the March 25 return, expect epic showdowns between Monroe’s men and the good guys, as well as a face-off between Capt. Tom Neville (Giancarlo Esposito) and his son, Jason (JD Pardo). ”There is this sort of unforgivable schism between father and son, and from that point on, their paths diverge,” Kripke reveals. ”Jason makes some radical changes, and Neville is left to deal with them.”

? Questions will be answered!

Yes, we will learn why the power went out. (In the April 8 episode, to be precise.) But almost better than that is the juicy intel about the long-simmering history between Rachel and Miles, which will come to light toward the end of the season and reveal what events left them on less-than-friendly terms. Here’s a question worth asking: Is the pair’s past romantic, as fans have theorized? ”That’s probably an excellent direction to go in,” Mitchell teases. ”[But] there’s a deep connection between the two of them, and it’s not all romantic.”

? New lands will be explored!

Our group of heroes will soon find themselves on ”different epic quests,” according to Kripke, and as a result viewers will spend some time in new locales. First, in the April 15 episode, we enter the Georgia Federation, a wealthier, more colorful (and more Southern) territory than the Monroe Republic. The Federation has more access to steam technology, as well as a larger coast that allows for trade with England, which Kripke points out is the first time the show mentions what has happened in the world beyond the former North America. We’ll later visit Plains Nation, a desolate land made up of nomadic, multiethnic tribes. (Fun fact: Their clothing was inspired by Sons of Anarchy.) ”That’s really fun to see,” Kripke says, ”because everyone you meet there is so hardscrabble and dangerous.”

? People will die!

”No one is safe,” warns Mitchell of the second half. ”It’s a world that’s incredibly precarious, and the deaths and violence will reflect that.”