While Charlie is distracted with the birth of his first grandchild, son Jimmy impersonates his father in order to investigate a murder aboard a freighter in the harbor.
Sidney Toler
as Charlie Chan
Phyllis Brooks
as Judy Hayes
Victor Sen Yung
as James Chan
Eddie Collins
as Al Hogan
John 'Dusty' King
as Randolph
Claire Dodd
as Mrs. Carol Wayne
George Zucco
as Dr. Cardigan
Robert Barrat
as Captain Johnson
Marc Lawrence
as Johnny McCoy
Richard Lane
as Joe Arnold
Ruth Clifford
as Nurse
Layne Tom Jr.
as Tommy Chan
