Conversation so far:
What was popular about Stirling Moss?
During his driving career, Moss was one of the most recognised celebrities in Britain, leading to many media appearances.
What was Stirling Moss recognised for?
In March 1958, Moss was a guest challenger on the TV panel show What's My Line? In 1959 he was the subject of the TV programme This Is Your Life.

Question: What appearances did he make?
Self-contained rewrite: What appearances did Stirling Moss make?