Clockblockers will remain stuck in time: NBC has yet to make a decision on whether to renew or cancel Timeless.

Negotiations to renew the sci-fi drama, which stars Abigail Spencer, Matt Lanter and Malcolm Barrett as a team tasked with traveling through time to stop a nefarious organization from changing the course of history, are still ongoing between NBC and studio Sony, which owns the show, NBC Entertainment president Bob Greenblatt said on a call with reporters Sunday. As Greenblatt explained, the network is going to wait to make a call on Timeless' future until after tonight's season finale, but a decision should come relatively quickly after that.

"We're hopeful, yet realistic," Greenblatt said of Timeless' chances of returning. So it sounds like it's probably done for, but there remains a sliver of hope if enough people tune in to see the Season 2 conclusion.

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In Season 2, Timeless is the definition of a bubble show. Ratings in Season 2 were even lower than they were in Season 1, and the show was initially canceled last year before fan outcry prompted NBC to revive it a few days later. But Timeless performs well in delayed viewing and has a devoted fanbase. Fans already brought it back last year, and they may be able to help bring it back for Season 3. And given how massive of a cliffhanger Sunday's finale ends on, we can only imagine how massive of a reaction the fandom will have if they don't get to see what's next in the Eric Kripke drama.

NBC has also yet to make a decision on Mindy Kaling's comedy Champions, which stars Anders Holm.

Timeless' two-hour Season 2 finale airs tonight at 9/8c on NBC, and if Clockblockers want the show to come back, they'd better tune in live.