The Case of My Vanishing Master (2) - S4.E14

Roger manages to arrive in time not only to stop the wedding, but he manages to convince Jeannie that the Tony she was about to manage was an impostor. Later, Tony comes home and is subjected to torture from Jeannie, who thinks that he is the impostor. Tony eventually convinces her that he is the real one and as he is about to go tell the impostor that the assignment is over when he finds out that the phony Tony is working as a double agent for a foreign power. Doctor Bellows and Roger then arrive and have a hard time trying to decide which one is the real Tony, until Jeannie causes the impostor's false teeth to fall out.