Dr. Jack

Harold Lloyd

as

Dr. 'Jack' Jac...

Mildred Davis

as

The Sick-Littl...

John T. Prince

as

Charles F. Has...

Eric Mayne

as

Dr. Ludwig von...

C. Norman Hamm...

as

Jamison - the ...

Jackie Condon

as

Boy's Pal (unc...

Mickey Daniels

as

Boy Patient (u...

Richard Daniels

as

Man (uncredite...

William Gilles...

as

Card Player (u...

Wally Howe

as

Asylum Guard (...

James T. Kelley

as

Card-Playing F...

'Auntie' Mackay

as

Undetermined S...

Florence Mayon

as

Card Player's ...

Oscar Morgan

as

Undetermined S...

Charles Steven...

as

Asylum Guard (...

Anna Townsend

as

Jamison's Moth...

Dorothy Vernon

as

Restaurant Hos...

Joy Winthrop

as

Undetermined S...