The second season of the demented show-within-a-show Cartoon Network series “Childrens Hospital” finds Malin Akerman joining the cast as Ingrid Hagerstown who portrays Dr. Valerie Flame, a woman with a secret identity who feuds regularly with Dr. Blake (Rob Corddry). Also, Henry Winkler comes aboard as actor Fred Nunley who plays insurance specialist Sy Mittleman, who becomes the object of obsession for Chief (Megan Mullally).