The Shanghai Cobra
The Shanghai Cobra is a 1945 mystery film directed by Phil Karlson and starring Sidney Toler as Charlie Chan. Plot
When three bank employees are killed with cobra venom, Detective Chan recalls an oddly similar case ten years earlier in Shanghai. In Shanghai in 1937, criminal Jan Van Horn was badly burned when the Japanese bombed Shanghai. After plastic surgery, he escaped custody and nobody knows what he looks like today. Inspector Davis, in charge of the case, is an old friend of Chan's who calls him in. Chan has a second reason to be interested...the bank is the central depository for radium distribution for a good part of the United States. The special vault holding the radium is a monster that seems impregnable from street level. But Charlie discovers a network of underground tunnels and sewer pipes beneath the bank. Tommy Chan and Birmingham, usually against orders, spend a goodly amount of time prowling these tunnels. At least until they discover a fourth body. Detective Larkin, an undercover officer posing as the bank's janitor, apparently found out too much. Another puzzle is how the murders were committed. There was no actual snake, and all the victims died out of reach of the nearest human being. Charlie discovers the first three victims all favored the same inexpensive restaurant. When he learns their expensive jukebox came from "an anonymous donor", he tracks down the control room booth for the jukebox. Oddly, it is concealed behind a bookcase on the second floor of the bank building...in an office housing a full chemical laboratory. The woman running the booth is arrested, but she has never seen her boss. Charlie discovers that when you touch the coin return button on the jukebox, a poisoned needle pops out. Charlie plants a false rumor that the radium will be moved to a safer location the next day. This forces the criminals to strike that night. But Chan hadn't counted on the use of explosives. He, Tommy, and Birmingham are trapped in an underground cave-in. Charlie taps into the underground phone lines and sends a morse code message. Police swarm the underground tunnels and arrest the robbery gang. Freed from the cave-in, Charlie exposes two identities. Chief Bank Guard John Adams is revealed to be the escaped Jan Van Horn. But it turns out he really was innocent. The detective who framed the case against Van Horn also disappeared from Shanghai at the same time. He is revealed to be Mr. Jarvis, owner of the chemical laboratory. And on his person is a cigarette lighter with a poison needle attatchment, which he used to murder Detective Larkin. Cast
Sidney Toler as Charlie Chan
Mantan Moreland as Birmingham Brown
Benson Fong as Tommy Chan
James Cardwell as Ned Stewart
Joan Barclay as Paula Webb (alias of Paula van Horn, daughter of Jan van Horn) 
Addison Richards as John Adams (alias Jan van Horn), Sixth National Bank guard
Arthur Loft as Bradford Harris (alias Special Agent Hume)
Janet Warren as Record Machine Operator
Gene Stutenroth as Morgan, a gangster
Cyril Delevanti as Detective Larkin, a police undercover officer at the Sixth National Bank
George Chandler Joe Nelson, coffee shop proprietor
James Flavin H.R. Jarvis, chemical engineer
 John Goldsworthy as Inspector Mainwaring
 Walter Fenner as Inspector Davis
 Mary Moore as Clerk in Laundry
 Stephen Gregory as Samuel Black, the third victim

References

External links
Charlie Chan Family

Shanghai Cobra at Letterbox DVD
Shanghai Cobra at BFI

1945 films
1945 crime films
American black-and-white films
Charlie Chan films
Monogram Pictures films
Films directed by Phil Karlson
1945 mystery films
American mystery films
1940s American films