Something's Gotta Eat T. rexes.

"Something's Gotta Eat T. rexes." is the as-yet-unaired thirteenth Season 4 episode (and series finale?) of Shadow Unit, with production number 4x13. According to the initial announcement, it will be written by Elizabeth Bear and Emma Bull and is currently scheduled to air on November 3, 2013.

Pre-Air-Date Speculation
This episode was originally scheduled to air on October 6, 2013; on February 22, Emma Bull announced that the airdates for "Apolysis" and all subsequent episodes would be bumped one month into the future. 

The title phrase originally appeared in the DVD extra Opportunity Cost (an Easter egg for the episode "Smoke & Mirrors"):
 * The suspect thinks he's the predator, and maybe he is, but he's got no idea there's a bigger predator following. Jackals should fear tigers, Chaz thinks. And what should tigers fear? Something's gotta eat T. rexes. Even if it's only bigger T. rexes.

In her LiveJournal, Elizabeth Bear stated that, since the first line was "spoileriffical", she'd provide an epigraph:
 * "This, too, is probable, according to that saying of Agathon: 'It is a part of probability that many improbable things will happen.'" ---Aristotle, Poetics