In the iZombie episode "Fifty Shades of Grey Matter" (S2E11), Liv consumes the brain of an erotic fiction writer, causing her to take on a hyper-sexualized persona. While investigating this death, the plot focuses on Peyton falling for Blaine and Major's ongoing struggle with his role as the Chaos Killer.
For a full breakdown of the episode and plot details, you can visit the episode page on Fandom or read the summary on TV Fanatic . [S2E11] Fifty Shades of Grey Matter