Like planes hitting buildings and large waves crashing on distant shores, reversal is the key to life and drama. Katie's cancer comes back with a vengeance. Nicky is busted, but not busted up for his affair with Lenora Bukowski, the sexy Polish émigré. Sarah goes to the edge, but chooses not to seduce her Lit 12 teacher. Saul gives the kiss of life to the young man he put in a coma, while Ari holds on for dear life. Ellie begins to reveal a secret to Eli about the angelic boy. And "No Show" has its final show with Katie Sampson as host.