No. He did guest on 4 episodes of "Mad About You" and one episode of "Frazier".
no edit: yes he made a cameo appearance in the beginning of an episode.
Yes, she played Dr Honey Snow in two episodes.
No, she didn't.
Yes, She appeared on Frasier as supermodel/zoologist Kelly Easterbrook in the fifth season opener ("Frasier's Imaginary Friend"). source: wikipedia
Victor Garber was indeed a guest star on Frasier in the episode titled 'Taking Liberties' (Season 8, Episode 4). He played an English butler named Ferguson who is employed by Dr. Frasier Crane after his previous employer dies. Victor was nominated for Outstanding Guest Actor in a Comedy Series at the 2001 Emmy Awards as a result of his performance in this episode.
Bill Gates was a special guest star.
Yes, she played Dr Honey Snow in two episodes.
No, she didn't.
Yes, She appeared on Frasier as supermodel/zoologist Kelly Easterbrook in the fifth season opener ("Frasier's Imaginary Friend"). source: wikipedia
mel brooks
Yes they did/
Victor Garber was indeed a guest star on Frasier in the episode titled 'Taking Liberties' (Season 8, Episode 4). He played an English butler named Ferguson who is employed by Dr. Frasier Crane after his previous employer dies. Victor was nominated for Outstanding Guest Actor in a Comedy Series at the 2001 Emmy Awards as a result of his performance in this episode.
Bill Gates was a special guest star.
Charlize Theron
mel brooks
No, but he did appear in other series during the 1990s, such as The Nanny, The Drew Carey Show and Touched by an Angel.
Season 7 Episode1 Momma Mia guest star: Rita Wilson
Of those four, Mel Brooks has not been on Friends.