Shadows Over Chinatown
Shadows Over Chinatown is a 1946 American mystery film directed by Terry O. Morse and starring Sidney Toler, Victor Sen Yung and Tanis Chandler. It is the second-to-last film starring Toler as Charlie Chan. Plot 
Late one night, Charlie Chan is shot at a San Francisco bus station. While on a missing-persons case, he investigates a series of slayings terrorizing the city. He is assisted officially by detective Jeff Hay and police captain Allen, and unofficially by his Number Two Son Jimmy and chauffeur Birmingham Brown. Cast 
 Sidney Toler as Charlie Chan
 Victor Sen Yung as Jimmy Chan
 Mantan Moreland as Birmingham Brown
 Tanis Chandler as Mary Conover, former employee of an escort service
 Mary Gordon as Mrs. Conover, Mary's grandmother 
 Bruce Kellogg as Cpl. Joe Thomas, Mary's sweetheart
 Paul Bryar as Mike Rogan, Mary's former boss
 John Gallaudet as Jeff Hay, private investigator
 Alan Bridge as Capt. Allen
 George Eldredge as Chief Lanigan
 Jack Norton as Cosgrove, pickpocket
 Mira McKinney as Kate Johnson
 Dorothy Granger as Joan Mercer, escort-bureau receptionist
 Lou Mercelle as narrator

Production 
Sidney Toler had been diagnosed with terminal cancer, but insisted on continuing his commitment to the film series. The studio accommodated him by granting him prolonged breaks for rest, and staging the scenes so as not to tax his strength. The studio conserved Toler's energy and spared him from extended movement; Toler is seated during much of the film. Although Toler remains the central actor, some of the action is diverted to Jimmy (Victor Sen Yung) and Birmingham (Mantan Moreland). To lengthen the running time of the film, a two-minute prologue was added, detailing the workings of a bureau of missing persons. None of the film's featured players appeared in this sequence. References

External links
 
 
 
 
 Review of film at Variety

1946 films
American black-and-white films
Charlie Chan films
Monogram Pictures films
Films set in San Francisco
Chinatown, San Francisco in fiction
1946 mystery films
American mystery films
1940s American films