Double, Double, Toil and Trouble

 is the fourth episode of the fourth season and the 111th episode of the Bewitched series. The episode was completed by August 11, 1967.

Plot
Darrin makes Samantha, who was performing her duties as Queen, end a royal session early. Endora and her friends enlist Serena's help to seek revenge. Serena tries to pass herself off as Samantha and drive him away.

General

 * The title is based on the three witches' dialogue in Shakespeare's "Macbeth" (Act IV, Scene I):


 * ''Double, double, toil and trouble;
 * Fire burn and cauldron bubble.


 * This is the first color episode with Serena.

Source Music

 * Serena (as Samantha) sings, "I Feel Pretty", music by Leonard Bernstein with lyrics by Stephen Sondheim. The song is uncredited.

Bloopers and Continuity Errors

 * The door in the kitchen by the back door is used as an entrance to a laundry room in this episode. In other episodes this room is either a broom closet or leads to the basement.

Casting

 * Elizabeth Montgomery was uncredited for playing Serena.

Cast

 * Elizabeth Montgomery as Samantha Stephens and Serena
 * Dick York as Darrin Stephens
 * Agnes Moorehead as Endora
 * George Tobias as Abner Kravitz
 * Sandra Gould as Gladys Kravitz
 * Stanley Beck as Ferdy
 * David White as Larry Tate
 * Ellen Weston as Witch in Samantha's Court (uncredited)