- Monty Woolley - Dr. Lane-Porteus
- Pierre Watkin - Mr. Robert Chanler
- Nella Walker - Mrs. Chanler
- Murray Alper - Blue Swan Waiter (uncredited)
- Don 'Red' Barry - Dr. Collins (uncredited)
- Granville Bates - Harry Cook (uncredited)
- Barbara Bedford - Nurse (uncredited)
- Margaret Bert - Little Boy's Mother (uncredited)
- Marie Blake - Miss Sally Green (uncredited)
- Virginia Brissac - Boardinghouse Landlady (uncredited)
- John Butler - Coronary Patient (uncredited)
- Don Castle - Dr. Bates (uncredited)
- Roger Converse - Dr. Joiner (uncredited)
- Nell Craig - Nurse Parker (uncredited)
- Frank Dae - President, Board of Directors (uncredited)
- Bess Flowers - Nurse (uncredited)
- Brenda Fowler - Head Nurse (uncredited)
- Harrison Greene - Bartender (uncredited)
- Howard Hickman - Dr. Harris (uncredited)
- Cy Kendall - Charlie (uncredited)
- Mary MacLaren - Lodger Bringing Blanket (uncredited)
- James Pier Mason - Lodger Going for Ambulance (uncredited)
- Tom McGuire - Clancy (uncredited)
- Jack Murphy - Intern (uncredited)
- Frank Orth - Mike Ryan (uncredited)
- Leonard Penn - Albert Foster (uncredited)
- Cyril Ring - Intern (uncredited)
- Clinton Rosemond - Conover (uncredited)
- Gilbert Russell - Intern (uncredited)
- Edwin Stanley - Resident Doctor (uncredited)
- Phillip Terry - Dr. Vickery (uncredited)
- Emmett Vogan - Detective Herman (uncredited)
- Bobs Watson - Little Boy (uncredited)
- William Worthington - Board Member (uncredited)
-
Harold S. Bucquet
- Max Brand
- David Snell
- Douglas Shearer
Lionel Barrymore interpreta a Dr. Leonard Gillespie en la película.
Lew Ayres interpreta a Dr. James Kildare en la película.
Lynne Carver interpreta a Alice Raymond en la película.
Nat Pendleton hace el papel de Joe Wayman.
Jo Ann Sayers hace el papel de Barbara Chanler.
Samuel S. Hinds hace el papel de Dr. Stephen Kildare.
Emma Dunn interpreta a Mrs. Martha Kildare en la película.
Walter Kingsford interpreta a Dr. P. Walter Carew en la película.
Truman Bradley interpreta a Jack Hamilton en la película.
Monty Woolley hace el papel de Dr. Lane-Porteus.
Pierre Watkin hace el papel de Mr. Robert Chanler.
Nella Walker interpreta a Mrs. Chanler en la película.
Murray Alper interpreta a Blue Swan Waiter (uncredited) en la película.
Don 'Red' Barry interpreta a Dr. Collins (uncredited) en la película.
Granville Bates interpreta a Harry Cook (uncredited) en la película.
Barbara Bedford hace el papel de Nurse (uncredited).
Margaret Bert interpreta a Little Boy's Mother (uncredited) en la película.
Marie Blake interpreta a Miss Sally Green (uncredited) en la película.
Virginia Brissac hace el papel de Boardinghouse Landlady (uncredited).
John Butler hace el papel de Coronary Patient (uncredited).
Don Castle interpreta a Dr. Bates (uncredited) en la película.
Roger Converse interpreta a Dr. Joiner (uncredited) en la película.
Nell Craig interpreta a Nurse Parker (uncredited) en la película.
Frank Dae interpreta a President, Board of Directors (uncredited) en la película.
Bess Flowers hace el papel de Nurse (uncredited).
Brenda Fowler interpreta a Head Nurse (uncredited) en la película.
Harrison Greene interpreta a Bartender (uncredited) en la película.
Howard Hickman hace el papel de Dr. Harris (uncredited).
Cy Kendall hace el papel de Charlie (uncredited).
Mary MacLaren interpreta a Lodger Bringing Blanket (uncredited) en la película.
James Pier Mason hace el papel de Lodger Going for Ambulance (uncredited).
Tom McGuire interpreta a Clancy (uncredited) en la película.
Jack Murphy hace el papel de Intern (uncredited).
Frank Orth interpreta a Mike Ryan (uncredited) en la película.
Leonard Penn interpreta a Albert Foster (uncredited) en la película.
Cyril Ring interpreta a Intern (uncredited) en la película.
Clinton Rosemond interpreta a Conover (uncredited) en la película.
Gilbert Russell interpreta a Intern (uncredited) en la película.
Edwin Stanley interpreta a Resident Doctor (uncredited) en la película.
Phillip Terry hace el papel de Dr. Vickery (uncredited).
Emmett Vogan hace el papel de Detective Herman (uncredited).
Bobs Watson interpreta a Little Boy (uncredited) en la película.
Jack Woody interpreta a Ed (uncredited) en la película.
William Worthington hace el papel de Board Member (uncredited).
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