The Mayo Clinic

Peter Coyote

Self - Narrator (voice)

Tom Hanks

Will Mayo (voice)

Sam Waterston

Charlie Mayo (voice)

Kevin Conway

William Worrall Mayo (voice)

Blythe Danner

(voice)

Gene Jones

(voice)

Carolyn McCormick

(voice)

Josh Lucas

(voice)

Rosa Gilmore

(voice)

John McCain

Self