The Riddler contrives his plots like artichokes. You have to strip off spiny leaves to reach the heart.
10 seconds sound clip from Batman (1966) - Hi Diddle Riddle (S1E1) TV Series.
You can hear this line at 00:06:15 in the Blu-ray version of the movie.
Quote context
[...]
- What idiots we are! Why couldn't we have worked that out?
- But what does it mean, though?
- Right, commissioner. There's a problem.
- We all know how this quizzical criminal operates. He deliberately leaves clues to confound us.
- Clues which may or may not lead to the real crime he's planning.
- A mere ruse, commissioner. A clever device to make you call me in.
- But why? Why would he want that? You're his deadly nemesis.
- The Riddler's mind is twisted. Crime's no fun for him unless it means outwitting us.
[...]