Dr. Adrian Revànche is a plastic surgeon that wants revenge on Stan for outmaneuvering him for the family home in "Saving Face".
After Stan reaches what he considers his peak, he's reminded that it's all downhill from here, so he seeks out a plastic surgeon he's seen to help him keep his looks. But he discovers that he's a villain who transplants Stan's face to his own to take over his entire life while leaving Stan unrecognizable. When Stan confronts the doctor and his family, he finds that doctor has removed all traces of his practice. But when the doctor privately explains to Stan exactly why he's taking over his life, he forgets to make note of a security camera that can prove Stan's story.
Stan manages to outrun the police and eventually get a copy of the tape where he enlists Tuttle to help him, but the doctor has kidnapped the family to alter them as further revenge on Stan. Piecing together clues from his kidnapping, Stan figures out that the doctor has taken the family to the marina. He locates the doctor who reveals that he wants to ruin them as further revenge on Stan. Fighting with scalpels, Stan manages to cut off and remove his original face. After he tells the family that he was worried that going downhill would also mean losing them, they head to Dr. Kalgary's to have his face returned.
Dr. Revànche is voiced by Simon Helberg.