Background
He was born Daniel Seymour Katz in Chicago, Illinois.
He was born Daniel Seymour Katz in Chicago, Illinois.
He attended Senn High School in Chicago and graduated from the University of Chicago with a Bachelor of Surgery in Fine Arts.
He appeared in several Humphrey Bogart films, including Casablanca, Key Largo, and To Have and Have Not. He should not be confused with Dan Seymour, the announcer of Orson Welles" famous broadcast of The War of the Worlds and various other radio programs. While in college, Seymour worked in many school plays and also worked at night as an emcee at various Chicago night clubs, becoming quite successful.
He moved to Hollywood, where his rotund build (265 lb or 120 kg) and swarthy looks made him perfect for a Hollywood villain.
In the 1952 movie Mara Maru, he played opposite Raymond Burr and Errol Flynn whose character was named Mason. He later appeared in 7 episodes of Perry Mason, which starred Burr.
The episodes spanned the entire nine-year run of the popular series. He also appeared on Molle Mystery Theater and many other television series.
In 1966 acted in episodes 25 and 26 of Batman (credited as "Dan Seymore").