Michael Moon (Robbie Coltrane) is a brother of Daphne. Michael appeared in the two-part series finale, Goodnight, Seattle, and his speech is almost entirely incomprehensible, spoken in a very fast Lancashire accent.

He also briefly appears in Something Borrowed, Someone Blue played by a different actor and is mentioned in IQ as having lost one of his toes after falling into a frozen lake. In Goodnight, Seattle, he is revealed to have lost another toe in a shooting incident.