Soooo … that happened.

Zoey goes to get information about Demetri's possible death from Alda -- whom prison has made even more attractive, as it does -- and Alda tells her that unless there's a hearing to determine whether or not Alda's going to be charged with something, Alda will not talk. Zoey does arrange the hearing by lying about Alda's pending appendicitis, then Alda engineers an escape. She throws Zoey a bone by saying that in her flashforward, she heard that they found Demetri's body in "building seven."

Demetri is, of course, imprisoned in a fiendishly complicated chair where, if he moves, he'll be shot by the gun (which will be fired off by … an arrow? Whatever, the whims of mad geniuses are beyond my ken.) and there are laser pointers, and behind him is a massive diagram detailing all the possible futures that Dyson Frost has seen. He calls it "the garden of forking paths." He tells Demetri, "In almost every future, I don't live past today. Seventy-eight percent of the time, you end up killing me … the point is, once we've glimpsed it, the future wants to happen. It gains weight. It's like atmospheric pressure bearing down, and if we want to escape that pressure, we have to do something drastic." Hence the crazy and elaborate schemes to kill Demetri -- or not really kill -- Demetri. It turns out that Dyson wants to fool the future into happening by presenting the possibility to killing Demetri, yet allowing them both to live.

While Demetri gets to sit in his silly chair and contemplate his mortality, his coworkers try to find ways to get him back. They are thwarted by Dyson Frost's clever feints. Only Mark gets special instructions on getting to Demetri. He eventually makes it out to Antelope Valley and meets up with Dyson Frost. Sadly, the meeting is cut short by Alda killing Dyson Frost (it is sad -- poor Frost is not so much evil as he is lonely and mad from what he knows), but Mark hops in Dyson Frost's car and manages to find the location. But he has to call into the office for help, and Janis is the one who points him to building seven. Nice work, mole!

Mark enters into the building and manages to fight a bad case of nerves to recall Dyson Frost's conversation with Charlie about the collected works of Dr. Seuss, then invokes the timeless rule of "One fish, two fish, red fish, blue fish" to disarm the elaborate gun-firing machine and save Demetri's life. Hurray! Hurray! (However, when Demetri stands up, he triggers a spraying arm that wipes out all the information on the big board depicting the garden of the forked paths. Win some, lose some.)

Now that that plotline is winding down, the show introduces a new complication in the form of a raving savant who appears to be hop-skipping through flashforwards all on his own. This raving savant, Gabriel, was friends with the homeless dude who got shot one episode ago -- both of them are linked to the "Raven river experiments" that Dyson Frost also alluded to, so it looks like we're about to embark on a plot to answer to the question "Who caused the flashforwards and why?"