Paul Lynde takes over from the previous season's John Astin as Father Lundigan, a church psychologist whose own mental state is far from stable. Having finally recovered from his first encounter with "flying nun" Sr. Bertrille, Father Lundigan pays another visit to Convent San Tanco. His arrival coincides with a bizarre post-hypnotic suggestion, wherein Sr. Bertrille in the Reverend Mother have switched personalities! Written by Lee Erwin and Stan Dreben, "The Return of Father Lundigan" was originally telecast on October 17, 1968. ~ Hal Erickson, Rovi