The 39th episode of (1966) Season 2 is titled " The Penguin Declines " . It first aired on January 18, 1967 , on ABC. This episode serves as the third and final installment of a rare three-part crossover arc featuring both The Joker and The Penguin. Episode Summary
: The Joker frees The Penguin from prison to assist in his crime wave. Together, they contaminate Gotham City's water reservoir, turning it into strawberry gelatin . Batman Season 2 - Episode 39
: The Joker, The Penguin, and several henchmen hide in the trunk of the Batmobile to gain access to the Batcave. However, Batman anticipates this, and a classic "K-POWW" fight ensues inside the cave, resulting in the villains' defeat. Cast and Guest Stars The 39th episode of (1966) Season 2 is
: The villains trick their former confederate, Venus , into asking Batman to take her to the Batcave. The Dynamic Duo agrees, but they make her fall asleep first to protect their location. Episode Summary : The Joker frees The Penguin
: Batman uses his "superhuman strength" to burst free from chains and rescue Robin from the jaws of a giant clam.