Dr. Iris Fennerman was the mother of Arvin Fennerman and the wife of Malcolm Fennerman.
Iris was first introduced when she and her husband Malcolm visited Los Angeles from London to see their son and meet his girlfriend Haley Marshall. Malcolm was originally supposed to be on his own, but there was a change of plans because at the last minute, Iris decided to join Malcolm on the trip since he wasn't able to go anywhere after a weekend in Brighton.
Arvin wasn't pleased by his mother's presence. He revealed that she was a judgmental snob and Arvin was worried that she would not approve of Haley because of her low work status. Arvin tried to get Haley to play along to pretend that she was an academic, but it did not play too well and Haley left. Later, in the hospital where Haley was in after she passed out because of the stickers on her arms being filled with all sorts of chemicals, Arvin told her that he panicked and that he told his mother the truth about Haley and her job and that if Arvin wanted to turn down a job to be with Haley, then that was his right. But Haley and Arvin quickly made up.