Madmen Crista Flanagan signed photo. 8x10 inches Crista Flanagan (born February 24, 1976) is an American actress and comedian, best known for her work as a cast member on the Fox sketch comedy series MADtv from 2005 to 2009, various roles in films made by Jason Friedberg and Aaron Seltzer, and for her recurring role as Lois Sadler on the AMC series Mad Men.