William Possesses Lena’s body on accident, and he ends up enjoying being in Lena’s body.
Zoom Has been practicing a new Speedster technique that lets him possess bodies at will, and he decides to test his new speedster technique on Caitlin.
Eobard Thawne lost his body in Crisis, and now he needs a new host body. Thawne takes over the body of his rival, and the man he hated the most. Aka Barry Allen's wife Iris West Allen.
Hannibal Bates decides to make a move on Caitlin in the form of Barry Allen to have some sexual fun with her.