That Was No Chick, That Was My Wife

 is the tenth episode of the fourth season and the 117th episode of the Bewitched series. The episode was completed by August 31, 1967.

Plot
While on a business trip to Chicago with Darrin to meet client Mr. Springer and his wife, Samantha teleports back home to check on Tabatha, only for Louise to arrive and due to a mishap, caused Mr. Springer to believe that Darrin had a mistress and brought her instead of Samantha, resulting in Larry having to either lose the account or fire Darrin (of course he chose to fire Darrin.)

However, thanks to some luck, Mr. Springer learns that Samantha was indeed in Chicago that day and Larry (who tried to apologize for meeting Darrin) rehired Darrin and believed that it was all Louise's fault.

Later, Louise came to the Stephenses' home to apologize for believing that Samantha never went to Chicago, then started to leave to see a psychiatrist (with Larry suggesting it). However, to save Louise, Samantha called in Serena to pose as her and explained that it was Serena whom Louise met that day and Serena pointed out that it was a trick.

General

 * The episode title is a play on the phrase, "That was no lady, that was my wife."

Casting

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

Cast

 * Elizabeth Montgomery as Samantha Stephens and Serena
 * Dick York as Darrin Stephens
 * Kasey Rogers as Louise Tate
 * William Kendis as Man (credited as Bill Kendis)
 * Arthur Adams as Charlie the Doorman
 * Herb Voland as Mr. Springer
 * Sara Seegar as Mrs. Springer
 * David White as Larry Tate
 * Marion Lorne as Aunt Clara
 * Erin Murphy as Tabatha Stephens (uncredited)