June 18 to Graham Chapman in 9 Steps
- June 18 is the birthday of Richard Perry
- Richard Perry is name checked by Life is a Rock
- Life is a Rock name checks Harry Nilsson
- Harry Nilsson recorded Aerial Ballet
- Aerial Ballet includes bass played by Larry Knechtel
- Larry Knechtel played bass for Harry
- Harry is a song by Eric Idle
- Eric Idle appears in Yellowbeard
- Yellowbeard features an appearance by Graham Chapman