Conversation so far:
What was Frasier Crane's role in the show Frasier?
In 1993, after the show Cheers ended, Frasier Crane and Lilith Sternin divorce offscreen, and Lilith is awarded custody of their son Frederick Crane, with Frasier granted visiting rights.
What else is unique about Frasier Crane's role in the show Frasier besides his divorce?
Frasier Crane works for the radio station, KACL, as the host of his psychotherapeutic radio show, The Dr. Frasier Crane Show.
Was the show Frasier popular?
Frasier Crane, whose own spin-off Frasier debuted in September 1993, was voted by 2 percent to have his own show.
What else is notable in the Frasier Crane article besides his role in the show Frasier and the its popularity?
Frasier Crane hires a live-in physical therapist, Daphne Moon, to look after Martin. Daphne is an eccentric, working class Englishwoman who professes to be a bit psychic.
Who plays Daphne Moon in the show Frasier?
Jane Leeves plays Daphne Moon.
Why does Frasier Crane hire a live-in physical therapist?
Frasier Crane hires a live-in physical therapist to look after Martin Crane.

Question: Who is Martin?
Self-contained rewrite: Who is Martin Crane in the show Frasier?