Police investigating a string of train crashes discover that they were all caused by sabotage.
Did You Know?
Re-titled 'Without Warning,' this film received its earliest documented telecast in the New York City area Thursday 31 July 1947 on WCBS (Channel 2). In Los Angeles television viewers got their first look at it Saturday 6 March 1949 on KTSL (Channel 2), and in Cincinnati it first aired Saturday 12 November 1949 on WKRC (Channel 11). See more