CONTROL corners KAOS Agent Klineschmidt in a house and attempts to take him alive. Before they can do that, he manages to shoot Max in the buttocks. Forced to stay at home, Max amuses himself by using binoculars to spy on the office building across the street. The office he's watching belongs to Otto Greer, who is a government contractor. Top secret papers have been disappearing from his office so the Chief assigns 99 to work undercover as secretary to Greer. Max keeps an eye on 99's progress and discovers too late that Greer is a KAOS agent planning to kill both of them.
Wheelchair bound mastermind Leadside is caught in a robbery by Max and announces a three-part plan. Phase one, he will escape from Max. Phase two, he will destroy CONTROL. Phase three, he will kill Maxwell Smart. After Leadside follows through on Phases One and Two, Max holes up in his apartment, vowing "Leadside will only complete Phase Three over my dead body." This is one of my favorite episodes and Ronald Long is brilliant as Leadside. "My mother gave me Norman." The wheelchair in the back of the truck bit is still side-splittingly funny.
The Chief takes up computer dating and winds up dating a gorgeous young woman. The Chief's boss (unseen) orders Max and 99 to follow the Chief to make sure that this romance is not a security risk. 99 also thinks that the Chief should be dating someone more his age, like her mother. The young woman is actually the wife of Dr. Paponickolini, who is giving the Chief a secret formula for eternal youth. The Chief arrives at Max's apartment for a dinner date with 99's mom but instead KAOS shows up and kidnaps 99's mother, thinking she's the wife of Dr. Paonickolini.
When budget cuts hit CONTROL, 99 is on the list of agents to be laid off. She then finds a temporary job at a trading stamp redemption center, which also happens to be a KAOS munitions drop that is about to begin distribution of their latest weapon, a stereophonic pistol. 99 finds out what is going on and informs the Chief, but is captured before she can give the location. The Chief and Larabee eventually find the location, but are captured themselves. It is now up to Max to find and save them.
Each time Smart picks a best man for his upcoming wedding to Agent 99, the man meets with a mysterious accident. The Chief deducts that there must be a link between all of the accidents and KAOS because all of Max's prospects are fellow agents. To prevent further loss of manpower a t CONTROL, Hymie is appointed best man. KAOS then reveals it's true interest in Max's choice of best man - nearly to the extinction of CONTROL.