The 100 4x04 "A Lie Guarded" Season 4 Episode 4 Extended Promo - Continued struggles with leadership and trust in Arkadia and Polis take violent turns while Abby (Paige Turco ) leads a team to a distant location hoping to find answers. Eliza Taylor, Bob Morley, Marie Avgeropoulos, Devon Bostick, Lindsey Morgan, Christopher Larkin, Richard Harmon, Zach McGowan, Isaiah Washington and Henry Ian Cusick also star. Ian Samoil directed the episode written by Kim Shumway (#404 ). Original airdate 2/22/2017. Subscribe to tvpromosdb on Youtube for more The 100 season 4 promos in HD !