The timeline of Syfy’s 12 Monkeys has gone loony enough, but thankfully, Season 3 won’t make you wait for answers very long. Meet the infamous “Witness,” along with Christopher Lloyd and all manner of new time periods in a first full trailer for 12 Monkeys’ Season 3 weekend marathon.

Entertainment Weekly revealed an extended new look at the show’s third season, which itself will premiere its first four episodes on Friday, May 19 at 8:00 P.M., followed by three-episode chunks on Saturday and Sunday. Amid the new footage, we see Back to the Future alum Christopher Lloyd getting back into time-travel as the Pallid Man’s father, while “The Witness” is unmasked as Cole and Cassandra’s son.

Also, check out the Season 3 poster:

Syfy

Even as the third season will air in the entirety of one weekend, Syfy has also confirmed a fourth and final season of ten episodes will wrap up the series in 2018. Watch the first teaser below, and stay tuned for the latest.