22. The Family Hour

Lois and Clark find out that they cannot have a kid together and they are devastated. They decide to ask Lois' father, Sam ( Harve Presnell ), for help but they know they will have to tell him that Clark is Superman. Sam is shocked by the news but he promises to see if he can help them while at the same time everyone is trying to keep the secret from Ellen ( Beverly Garland ). In the meantime, Dr. Klaus "Fat Head" Mensa ( Harry Anderson ) is released from prison where he developed mind-control powers.

He now wants revenge on his former colleagues for not helping him. He uses his telekinetic powers to kill one of them. Threatened by Mensa, Sam's current partner, Misha ( Brian George ), forces Sam to reveal Superman's identity. When Mensa is about to kill Misha, Misha reveals Superman's identity to Mensa. Mensa kidnaps Clark's and Lois' parents and threatens to kill them if Superman tries to stop him from stealing the bank gold. Misha is guarding the parents, but he decides to help them and does not follow Mensa's orders. Superman stops the bank robbery, but Mensa escapes.

Mensa orders Misha to hook him up the "Bummer-Be-Gone" invention, believing it to increase his abilities, but it takes his telekinetic powers away while also erasing the knowledge that Clark is Superman away from Sam, Ellen and Misha. The episode - and series - ends with someone, unseen and unknown, who seems to know Clark's secret identity, leaving a baby in the bassinet in the living room with the Superman emblem as a blanket over the child and a note too, saying that the child belongs to them. After 6 months of marriage, they finally have the child they've always wanted and both sets of grandparents are happy too.

Note: Last appearance of Dean Cain as Clark Kent / Kal-El/Superman, Teri Hatcher as Lois Lane, Justin Whalin as Jimmy Olsen, Eddie Jones as Jonathan Kent, K Callan as Martha Kent, Harve Presnell as Sam Lane, Beverly Garland as Ellen Lane.