The ratings for Fox’s Fringe rose its second week back on the air, enough to tie NBC’s Grimm at 9 p.m.

Fringe was seen by 3.1 million viewers and delivered a 1.2 adult demo rating, up 33.33333333 percent from last week (if you want to be really exact about it). Grimm had 4.2 million viewers and also had a 1.2 rating. As pointed out in the most recent edition of our Death Watch rundown of each broadcast show’s survival odds, the industry rumor mill on whether Fringe will get renewed flipped from negative to positive this week after Fox’s Alcatraz ratings bottomed out. Nothing is for sure yet, but this recovery doesn’t hurt.

Also Friday: CBS’ Undercover Boss (1.8) won 8 p.m., CSI: NY (1.6) topped 9 p.m. and 20/20 (2.1) led 10 p.m. and the night. CW’s Nikita (0.4) was really low, Supernatural (0.7) was up a tick.