Villains are always trying to find the batcave. That's why it is important to have a decoy ready. STRICTLY NO TREPASSING
First seen in “The Joker’s Last Laugh” / “The Joker’s Epitaph”
Written by Peter Rabe and Lorenzo Semple Jr.
Directed by Oscar Rudolph
Season 2, Episodes 47 and 48
Production code 9747
Original air dates: February 15 and 16, 1967