Neil Patrick Harris

役 Doogie Howser

Max Casella

役 Vinnie Delpino

James Sikking

役 Dr. David Howser

Belinda Montgomery

役 Katherine O'Brien Howser

Kathryn Layng

役 Nurse Mary Margaret "Curly" Spaulding

Lawrence Pressman

役 Dr. Benjamin Canfield

Lucy Boryer

役 Janine Stewart

Markus Redmond

役 Raymond Alexander

Mitchell Anderson

役 Dr. Jack McGuire

Lisa Dean Ryan

役 Wanda Plenn