- Title is a riff on the popular running item in 'Mad' Magazine called "Spy vs. Spy".
- Claudia Christian considers this episode to be a low point of her career.
- Title is a punning reference to the classic 1967 Moody Blues LP: 'Days of Future Passed'.
- The title for episode #2.16, "London Calling", is from the 1979 double album of the same name by The Clash.
