Simplify the following text for a Grade 7 native English-speaking person.
Original: Also , recurring guest star Phil Hartman and the show 's then-script supervisor Doris Grau made their first episode in the show .
Simplified: Recurring guest star Phil Hartman makes his first appearance as Hutz . The show 's then-script supervisor Doris Grau also voices a character in the show for the first time .