Monty Margetts

Trouble begins in the Monster household when Herman tells Lily he intends to attend an Army reunion banquet wearing his old uniform. Lily is against the idea since Herman would have to spend the night away. However, she agrees, providing Herman will lose enough weight in the ten days remaining until the reunion to fit into his old uniform.

Samantha tells Endora she doesn't have time for a dress-fitting. Endora solves Samantha's problem by transforming herself into En-Sam, identical to Samantha. Bob Frazer, an author, falls for En-Sam and they do the town together. Meanwhile, Darrin tells Samantha to expect a visit from his friend, Bob Frazer. Gladys Kravitz, who has seen En-Sam with Bob, is sure the Stephens home is about to break up. After Bob sees Samantha and mistakes her for En-Sam, Samantha explains to Endora the trouble she is causing. Endora is convinced when she learns Bob is expected at the Stephens home. All of En-Sam's efforts to break with Bob fail. Bob is determined to have a showdown with Darrin over Samantha. Samantha tells Darrin that Bob has fallen in love with Endora. Endora, still En-Sam, arrives and Bob thinks En-Sam and Samantha are identical twins. Although Endora promises to give Bob Up, Samantha, knowing her mother, is not sure what she will do.

Andy sends Opie to an affluent boys' camp.

Andy learns that his girlfriend, Helen, was once arrested for carrying a gun, gambling and keeping company with a hoodlum.

Samantha reads Halloween stories to Tabitha and shows her pictures in the book. When Darrin scolds Samantha, she insists the stories are harmless and Tabitha will go trick or treating like any other child. Upstairs, Tabitha brings the spooks to life and the picture page is blank. Gladys Kravitz prepares to take her nephew Tommy out in a Jack o' Lantern costume. She tells Abner that Samantha should stay home. While Gladys is snooping around, Tommy hears laughter from Tabitha's room. A spook pokes its head out and Tommy bolts in terror. Later, as Darrin waits for Louise and Larry Tate, Samantha and Tabitha go out. The spooks follow and Samantha thinks they are Tabitha's friends. When they play rude tricks, Tabitha insists it was. Samantha takes her home and is horrified when she sees the blank page and then can't get the spooks back. Tommy changes places with the jack O' Lantern. After the spook shoves cake in a neighbor's face, Gladys takes him home. Tommy and the other spooks play tricks on Darrin and the Tates. The jack o' lantern scares the wits out of Gladys. She rushes over to the Stephens' where the spooks have changed Tommy into a goat. Samantha finally restores him to normal and makes everyone for-get what happened. With a few words, Tabitha gets the spooks back in the book. Darrin and Samantha are relieved when Tabitha settles down with a teddy bear. As soon as they leave, a grizzly bear lumbers out of Tabitha's closet.