Tom Selleck was extremely nervous when he joined the cast of Friends as Dr. Richard Burke. He had no background on sitcoms, and the pressure of the role was intense. However, Courteney Cox helped him get through it, and Jennifer Aniston praised his behavior with the cast behind the scenes. On the other hand, Aniston wasn't complimentary towards every guest-star, especially Fisher Stevens during the earlier seasons, who had a negative attitude towards the show and the people involved.
