Remember the time that Stewie and Brian were locked in a vault at a bank? One upcoming episode has a similar two-characters-only flavor, and this time it's not Stewie and Brian but Stewie and... Sir Ian McKellen . The legendary actor plays Dr. Pritchfield, a child psychologist who meets with Stewie after he gets in trouble at pre-school. Dr. Pritchfield is "authoritative, probing, and ultimately a little victimized," according to Appel. "It’s the first time Stewie has seen a therapist and I can tell you they dispense with questions of sexuality in the first 90 seconds of this episode," he says. "They delve into surprising and revealing parts of Stewie throughout — some that Stewie is happy to discover and some that he is very unhappy to discover." The episode, which was written by Family Guy alum Gary Janetti (who co-created the British series Vicious starring McKellen), includes a running gag about "whether or not Sir Ian McKellen believes Stewie has a British accent."
MacFarlane has served as an executive producer during the show's entire history. The first executive producers were David Zuckerman ,  Lolee Aries , David Pritchard, and Mike Wolf.  Family Guy has had many executive producers in its history, including Daniel Palladino , Kara Vallow , and Danny Smith . David A. Goodman joined the show as a co-executive producer in season three, and eventually became an executive producer.  Alex Borstein , who voices Lois , worked as an executive and supervising producer for the fourth and fifth seasons.