《伞学院》第一季第六集：

　　《不曾成真的过去》

　　"The Day That Wasn't"

　　During Klaus's time jump, he ended up in the Vietnam war and fell in love with a soldier named Dave. Meanwhile, the Handler takes Five to the Commission's headquarters. Cha-cha is sent orders to terminate Hazel. Luther informs the Academy about the impending apocalypse but fails to inspire the group to fight. Angry at being excluded and with her new powers emerging, Vanya unknowingly causes a rainstorm and bends several streetlamps. Klaus asks Diego to help him sober up, hoping to see Dave's ghost before the world ends. Luther feels betrayed when he discovers his moon research was pointless. Diego discovers that Grace has been reactivated and is dumbfounded. Luther and Allison confess their romantic feelings. Five intercepts orders to protect a man named Harold Jenkins. He alters the orders, telling Cha-Cha to kill Hazel and vice-versa. Vanya discovers her father's notebook at Leonard's house, reads it and learns her father knew about her powers and suppressed them. Five steals a time-travelling briefcase and flees the Commission. He arrives at the beginning of the episode, altering the timeline, and rallies his siblings to stop the apocalypse.