Batman and Robin escape Chandell's trap. Once back in the Batcave, they deduce his plan to get the Wayne family fortune by killing Bruce Wayne and Dick Grayson, then marrying the rightful heir, Aunt Harriet. In order to trap the villain, Bruce and Dick fake their own deaths. However, Harry has also figured out his brother Chandell's scheme, and desiring the Wayne fortune for himself, concocts a plan to masquerade as his twin brother.

Chandell, the musical virtuoso, visits Gotham City for a piano concert. But unknown to the public, Chandell is being blackmailed into a life of crime by his twin brother Harry, who retains most of the profits. Chandell intends to buy off Harry forever, and he knows just where to get the funds - from the Wayne family fortune. With Batman and Robin out of town, he suspects the robbery will be a piece of cake. However, Batman has been listening to Chandell's concert remotely, and after detecting an anomalous chord, summons Robin back to Wayne Manor to investigate.

When the lease payment for Gotham City fails to be made on time, possession of the city falls into the hands of Egghead. Chaos ensues as the villain fires Commissioner Gordon and bans the Dynamic Duo from city limits. While the criminal underworld enjoys free reign, Batman and Robin search the city charter's fine print for a solution.

Egghead steals the Gotham City charter. He finds a loophole that could give him control of Gotham City if descendants of the original founding families (including Bruce Wayne) do not pay nine raccoon pelts to Chief Screaming Chicken on time. Not only is he interested in stopping the payment, but Egghead believes he also has a lead on Batman's true identity.

Aunt Harriet purchases a clock as a birthday present for Bruce Wayne, unaware that it is a plant by the Clock King. But when the villain learns that a control switch meant for his final caper has been errantly placed on the timepiece, he breaks into Wayne Manor to retrieve it, nabbing some valuable watches in the meantime. Batman and Robin shortly deduce his master plan and race to stop him.

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After a robbery aided by a rigged timepiece, Batman and Robin deduce the Clock King must be in Gotham City. Disguised as a pop art expert, the villain brings his latest masterpiece to the Parkhurst Gallery. But everyone is surprised when the sculpture turns out to be more than just a piece of art, and the Clock King makes off with a valuable time-related painting. Batman and Robin follow a clue to the villain's hideout, unaware that a trap awaits them.

When the Dynamic Duo realizes Ma Parker has seized control of the Gotham Penitentiary, they must get in to stop her.

Ma Parker and her delinquent children are pulling off a crime wave in Gotham City. Batman and Robin round up the gang one by one, but when the arrests seem all too easy, the Dynamic Duo suspect something else more sinister may be up.

With his creation of a powerful mind control potion successful, King Tut schemes to bring Gotham City under his total control.

King Tut returns with a new plan involving preserved specimens of extinct Egyptian scarabs.