Betty Bryant is an ambitious newspaper reporter in love with Dan Barton, a member of a big-city Emergency Squad who are trained to deal with riots, cave-in, explosions, fires and other emergencies where lives are at stake. Slade Wiley, an unscrupulous tunnel builder, finds that his low bid on the Newford Tunnel project is causing him to lose a lot of money, and has underworld leader Nick Burton set off blasts to frighten the stockholders into selling their shares at a low price so he can buy up the stock. Betty is investigating the deal when Wiley and Burton take her on a "tour trip" to the tunnel.
William Henry
Louise Campbell
Richard Denning
Robert Paige
Anthony Quinn
John Miljan
John Marston
Joseph Crehan
Sam Ash
Barbara Barondess
Henry Blair
Stanley Blystone
Wade Boteler
George Bunny
Sonny Bupp
Tommy Bupp
A.S. Byron
Donald Curtis
Kenne Duncan
Jimmie Dundee
Jack Egan
Lillian Elliott
Maude Fealy
Walter Fenner
Oscar 'Dutch' Hendrian
Weldon Heyburn
Darryl Hickman
Carol Holloway
George Humbert
Jack Kennedy
Willard Kent
George McKay
Ivan Miller
Howard M. Mitchell
Rex Moore
Norma Gene Nelson
Pat O'Malley
James Pierce
Catherine Proctor
Wilfred Roberts
Oscar Rudolph
James Seay
Frank Shannon
Georgia Simmons
Walter Tetley
Eduardo Thomajan
Zeffie Tilbury