- Does This Remind You of Anything?: the pineapple.
- Did Not Do the Bloody Research: anything cockney.
- Getting Crap Past the Radar: Doof and Double 0-0 discussing the latter's name.Dr. Doofenshmirtz: So if he's "p" and you're "ooo", together you spell...Double-0 0: No, they're not O's, they're zeroes, all right?Dr. Doofenshmirtz: I was just going to say "ooop"... looks like I struck a nerve there!
- Sherlock Homage: Candace and Stacy wear the classic Sherlock outfit and perform an investigation.
- Soft Water: Inverted
- Writing Indentation Clue
- Wrong Genre Savvy: After Agent P and Agent Double 0-0 are free they have to follow Doof to stop him. There are the stairs. Agent Double 0-0 goes up through the inner workings of Big Ben. Agent P takes the elevator.