My Grandson, the Warlock

 is the fourth episode of the second season and the fortieth episode of the Bewitched series. The episode was completed by July 1, 1965.

Plot
Mistaking Louise and Larry Tate's baby for his grandson, Maurice whisks the baby to the London Warlocks Club to begin his magical training. Meanwhile, Gladys thinks Samantha had her baby in only three months.

General

 * Elizabeth Montgomery was halfway through her real-life pregnancy whilst filming this episode.

Bloopers and Continuity Errors

 * When Darrin is driving Larry and Louise around to avoid taking them to his house, he pulls over and pretends there is something wrong with the car. However, one can see in the background the home of Pleasure O'Riley, their next door neighbor. This means that Darrin stopped across the street from his house, the very place he wants to avoid.
 * A flight from London to New York takes eight to ten hours. If Louise saw Maurice with the baby in London it would not be possible to land in New York before Maurice left the Warlock Club.

Cast

 * Elizabeth Montgomery as Samantha Stephens
 * Dick York as Darrin Stephens
 * Agnes Moorehead as Endora
 * Alice Pearce as Gladys Kravitz
 * George Tobias as Abner Kravitz
 * David White as Larry Tate
 * Irene Vernon as Louise Tate
 * Kendrick Huxham as Kendrick
 * Winnie Coffin as Nanny Witch
 * Beryl Hammond as Kitty Girl
 * Maurice Evans as Maurice