Conversation so far:
what happened to glen campbell in 1973?
After the cancellation of his CBS series in 1972, Campbell remained a regular on network television.
what tv seroes was canceled?
CANNOTANSWER.
what tv series did he become a part of?
He hosted a number of television specials, including 1976's Down Home.

Question: what other tv specials did he do?
Self-contained rewrite: what other tv specials did Glen Campbell do besides Down Home?