|Behind the scenes|
|First episode||Full Moon, Saturday Night|
|Last episode||On the Beach|
William Swift, known as Wild Willy, is a fictional doctor from the medical drama ER.
He temporary stepped in for David Morgenstern as Chief of Emergency Medicine in the first season, then appeared in the fourth season episode Think Warm Thoughts as a Synergix attending physician and appeared in an uncredited cameo in the eighth season episode On the Beach.