'Gen V' creator Eric Kripke discusses the major twist in episode 7, revealing Dr. Thomas Godolkin's true identity as Cipher.
The plot twist shows Dr. Godolkin, played by Ethan Slater, has been disguising himself as Godolkin University dean Cipher, played by Hamish Linklater, throughout the season.
Dr. Godolkin's plan was to train Marie, played by Jaz Sinclair, to become strong enough to gain the power of healing and/or resurrection.
After manipulating Marie into restoring him to his original form, Dr. Godolkin separates from his host, whose real name is revealed to be Doug Brightbill.
Author's summary: Eric Kripke explains the plot twist in Gen V.