The CW has released the logline for The 100 Season 3 Episode 3 “Ye Who Enter Here" airing February 4, 2016 at 9 pm ET on the CW.
"MICHAEL BEACH (“SONS OF ANARCHY”) GUEST STARS — Clarke (Eliza Taylor) wrestles with a decision. Bellamy (Bob Morley) learns that something isn't what it seems. Meanwhile, Murphy (Richard Harmon) plots to betray his former Chancellor (Isaiah Washington). Paige Turco, Henry Ian Cusack, Marie Avgeropoulos, Devon Bostick, Lindsey Morgan, Chris Larkin and Ricky Whittle also star. Antonio Negret directed the episode written by Kim Shumway (#303)."
The official description doesn't come close to describing the intensity of the hour or the threat faced by the Grounders and the Arkers, but provides some insight into what's coming up.
The 100 Season 3 premieres January 21, 2016 at 9 pm ET on the CW.