Conversation so far:
What are the associate pythons?
Several people have been accorded unofficial associate Python status over the years. Occasionally such people have been referred to as the 'seventh Python'.
Who are the associate pythons referred to as the 'seventh Python'?
The two collaborators with the most meaningful and plentiful contributions have been Neil Innes and Carol Cleveland.
What Monty Python films or shows did Neil Innes and Carol Cleveland work on?
Neil Innes is the only non-Python besides Douglas Adams to be credited with writing material for Flying Circus. He appeared in sketches and the Python films.
What were Carol Cleveland's contributions to Monty Python?
Carol Cleveland was the most important female performer in the Monty Python ensemble, commonly referred to as the female Python.
Does the Monty Python article mention if Douglas Adams is the Hitchhiker Guide to the Galaxy author?
No
What films did Neil Innes work on?
He would later portray Ron Nasty of the Rutles and write all of the Rutles' compositions for All You Need Is Cash, a mockumentary film co-directed by Idle.

Question: Are there any famous sketches Innes wrote or appeared in for Monty Python?
Self-contained rewrite: Are there any famous sketches Neil Innes wrote or appeared in for Monty Python?