Conversation so far:
What were some of Buster Crabbe's works?
In King of the Jungle (1933), Jungle Man (1941), and the serial King of the Congo (1952), Buster Crabbe played typical jungle man roles.
Did Buster Crabbe ever win any awards for his acting work?
How was Buster Crabbe viewed in Hollywood by fans, critics, or costars?
Who were some of Buster Crabbe's costars?
Buster Crabbe starred in several popular films at this time, including The Sweetheart of Sigma Chi, alongside Betty Grable, and Search for Beauty.
What films did Buster Crabbe appear in?
In 1936, Buster Crabbe was selected over several stars to play Flash Gordon in the first,  niversal Pictures Flash Gordon serial.
Did the 1936 science-fiction film superhero serial, Flash Gordon do well with Buster Crabbe as the lead?
Flash Gordon was Universal's second-highest-grossing film of 1936, after Three Smart Girls, a musical starring Deanna Durbin.
What else did Buster Crabbe do in Hollywood in the 1930s besides Flash Gordon?
In 1939 Buster Crabbe reunited with Betty Grable, for a lead role in the mainstream comedy Million Dollar Legs.

Question: Was he active after 1940?
Self-contained rewrite: Was Buster Crabbe active afrer 1940?