"The Joker's Hard Times"
Joker ties up Batman, Robin, and the newly reformed Venus and places them all in a shallow pool along with a giant clam. Robin struggles and whines but ends up inside the clam, with only one slippered foot hanging out from the mollusk's great maw.
Batman summons an "unknown inner strength" to break his chains, and pries the clam open to release Robin.
Joker recruits Penguin to help him commit twelve crimes based on the zodiac signs.