Riddle me this, crime fighter. What room can no one enter?
7 seconds sound clip from Batman (1966) - A Riddle a Day Keeps the Riddler Away (S1E11) TV Series.
You can hear this line at 00:09:54 in the Blu-ray version of the movie.
Quote context
[...]
- Holy sewer pipe! What's he up to?
- I knew it was a phony crown all the time.
- Riddle me this, crime fighter. What room can no one enter?
- If you figure it out, look for another royal riddle in this crown.
- That ends any chance of tracking him with the homing device. Shall we after him in the manhole?
- We'll never find him. There're hundreds of tunnels down here.
- A riddle a day keeps The Riddler away.
- What?
[...]