Blackbird to Bruce Dern in 7 Steps
- Blackbird was written by Paul McCartney
- Paul McCartney wrote You Can't Do That
- You Can't Do That was sung by Harry Nilsson
- Harry Nilsson sang The Ash Grove
- The Ash Grove was written by Diane Lampert
- Diane Lampert wrote the title song for Silent Running
- Silent Running starred Bruce Dern