You walk down a set of stairs hidden behind a clock. You enter a large cavern. And there you see all manner of things. A large computer. A car like no other. Cases displaying costumes. And trophies. You have entered the Batcave, and this week we're reading three stories featuring the first appearances of those three most famous Batcave trophies: the robotic T-Rex, the giant Joker playing card and the giant penny.

Here's the link to the article regarding the Joker Card as mentioned in the episode: https://www.cbr.com/batman-giant-joker-playing-card-batcave/

The Isle That Time Forgot (Batman V.1 # 10)

Rackety-Rax Racket (Batman V.1 # 32)

The Penny Plunderers (World's Finest Comics # 30)

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