Conversation so far:
What did West do in Adam West's post Batman career?
West's first post-Caped Crusader role was in the film The Girl Who Knew Too Much (1969).
Who did he star with in The Girl Who Knew Too Much?
CANNOTANSWER.
Did the movie do well?
the movie was a box office disappointment.

Question: What did West do next?
Self-contained rewrite: What did West do next after The Girl Who Knew Too Much?