Biff Elliot was an American actor. He is perhaps best known for his role as popular detective Mike Hammer in the 1953 version of I, the Jury and for his guest appearance as Schmitter in the Star Trek episode "The Devil in the Dark".

Michael Hammer is a fictional character created by the American author Mickey Spillane. Hammer debuted in the 1947 book I, the Jury. Hammer is a no-holds-barred private investigator who carries a Colt .45 M1911A1 in a shoulder holster under his left arm. His love for his secretary Velda is outweighed only by his willingness to kill a killer. Hammer's best friend is Pat Chambers, Captain of NYPD Homicide. Hammer was a World War II army veteran who spent two years fighting jungle warfare in the Pacific Ocean theater of World War II against Japan.