Joker's mole was never captured in this episode. She is last seen escaping with Joker from the hideout but was never mentioned or seen again.
Robin: Can I go first? I wanna see their faces.
Batman: Dynamic seniority.
Gordon: I warn you Joker, if the Maharajah is harmed, we'll hunt you down if it takes a hundred years.
Joker: By that time my jokes will be stale, wouldn't they, Commissioner?
The Maharajah: Paid to the order of Bat...Man...
Batman: One "T".
Joker: Egads! I'm deflated!
Batman: A fitting end for you, Joker. Like the rest of your criminal ilk, you were never anything but a threatening bag of hot air.
"The Joker Is Wild"mentions that Joker is an evil master of disguise. This ability is used here to good advantage when he dons a mask and body padding to play the Maharajah.
The Joker made a total of 6 appearances in the first season. They were "The Joker Is Wild", "Batman Is Riled", "The Joker Goes to School", "He Meets His Match, the Grisly Ghoul", "The Joker Trumps an Ace" & "Batman Sets the Pace".