Conversation so far:
What was the Role in Frasier?
Frasier works for the radio station, KACL, as the host of his psychotherapeutic radio show.
What else is unique about his role?
he had been publicly humiliated after climbing onto a ledge and nearly committing suicide before being talked down.
Was the show popular?
CANNOTANSWER.
What else is notable in the article?
Frasier hires a live-in physical therapist, Daphne Moon .
Who plays Daphne Moon?
Daphne Moon (Jane Leeves).
Why does he hire a live in  physical therapist?
to look after Martin.
Who is Martin?
his father Martin.
Are there any other characters in the show?
and brother Niles (David Hyde Pierce.

Question: Are there any smaller characters that are important to the show?
Self-contained rewrite: Are there any smaller characters that are important to the show Frasier?