Darrin and Samantha are in Paris on a joint business trip/vacation. Samantha knows that if her father finds out they were in Europe without expressly coming to visit him in London, he would have a fit. As such, Samantha tries to convince Darrin to make a stop in London for such a purpose. Darrin's response is that they will do so only if they have the time on their way back to the US. However, Maurice does find out they are in Paris, and comes to express his displeasure in an especially harmful way to Darrin. Endora, knowing that Maurice is on his way to Paris, tries to beat him to Samantha and Darrin to neutralize the situation. What Endora decides to do to while Darrin is at a business meeting is to conjure a second Darrin, one that is kinder and more accommodating to whatever Maurice wants. A problem ensues when the real Darrin arrives back early from his business meeting. Endora and Samantha have to figure out best to handle the situation with the extra Darrin. Endora may have to pull out her strongest weapon against Maurice.
—Huggo