Brothers & Sisters Season 5 Episode 5 (Brothers & Sisters s05e05) with title “Call Mom” aired on Sunday, October 24th 2010 at 10:00 pm via ABC Network.
Here is summary for Brothers & Sisters Season 5 Episode 5 :

Nora’s motherly skills and advice catch the attention of a radio producer who invites her to audition for a new show. But when Nora follows through with the invite, she suddenly finds herself out of her league, competing with a famous personality, Dr. Alexandra Kirby.