Hippie, Hippie, Hooray

 is the twenty-first episode of the fourth season and the 128th episode of the Bewitched series. The episode was completed on October 12, 1967.

Plot
Early in the morning, Samantha discovers an article on the first page of the newspaper about a "Love-in Riot", with a picture of Serena looking like her. Before Darrin sees the paper, Samantha use her powers to erase the photo, which causes Darrin a bit of confusion as to why there is no photo.

At the Tate's house, Larry sees the photo in the newspaper and believes that Samantha had gone full hippie with Darrin keeping it a secret. At the office, Larry invites himself and Louise to come to the Stephenses' house that night for a game of bridge. That night, as Samantha and Darrin are preparing for the game, they hear music upstairs in Tabatha's room, only to discover that it is Serena playing the music as a lullaby for Tabatha. Darrin then realizes that the reason why Larry invited himself and Louise to come over is because Larry thinks that Serena was Samantha in the photo. After an argument, Darrin tells Serena she is no longer welcome in their home.

After leaving, Serena overhears Darrin rant about what happened and decides to get revenge. As the Tates arrive, Larry admits that he was wrong about Samantha being a hippie. Then Larry sees the guitar which Serena left, convincing him that Samantha really was arrested. During the game, a news report shows Serena getting arrested and Darrin tries to point out that it is Serena, Samantha's look-alike cousin.

The next day at the office, as Darrin and Larry are trying to get an account, Serena arrives, looking like Samantha, but wearing mod clothes, and acts outrageously. Serena's fresh behavior makes the client Mr. Giddings think that Darrin has a bad wife, resulting in McMann & Tate losing the account. However, Larry does not care about the account. He says he is worried about Samantha's behavior. Darrin keeps telling him that it was not Samantha, but her doppleganger cousin. To prove it, he invites Larry and Louise to the house so they can finally see and end the confusion. Later, Samantha attempts to get Serena to come, but her cousin refuses to answer. Samantha devises a plan to transform herself into Serena, and switch back and forth between herself and Serena to try to convince the Tates.

The Tates arrive. Samantha, dressed as Serena, sings "The Iffin' Song" to convince Larry and Louise that she is Serena. Afterwards, Samantha and Darrin realize that since dinner time is approaching, Larry and Louise will expect to see Samantha and Serena together at the same time. Larry is still doubtful about Samantha having a look-a-like cousin, but Louise does not forget her encounter with Serena in the past. With no other solution, Darrin apologizes to Serena for what he said about her. Dinner is ready, and Larry asks where Serena is. They say she went upstairs because of a headache. Hearing Darrin's apology, Serena comes down and thanks Darrin for his apology.

General

 * The episode title is an allusion to the cheer, "Hip, hip, hooray!"
 * Except when impersonating Samantha, this is the only Bewitched episode when Serena does not have black hair.

Casting

 * Elizabeth Montgomery was uncredited for playing Serena.
 * Agnes Moorehead did not appear and received credit only.

Music

 * Instead of the usual theme music, The Iffin' Song plays over the end credits.

Cast

 * Elizabeth Montgomery as Samantha Stephens and Serena
 * Dick York as Darrin Stephens
 * Erin Murphy as Tabatha Stephens
 * Kasey Rogers as Louise Tate
 * Walter Sande as Mr. Giddings
 * Jean Blake as Secretary
 * Ralph Story as Bud Le Beau
 * David White as Larry Tate
 * Diane Murphy as Tabatha Stephens (uncredited)