In the conclusion of a two-part story, Elliot Ness (Robert Stack) has arranged for Federal prisoner Al Capone (Neville Brand) to be transferred from his prison cell in Atlanta to a maximum-security lockdown at the newly opened Alcatraz. Meanwhile, several of Capone's loyal lieutenants have set in motion a plan to help their boss escape before he arrives at "The Rock." For this purpose, they take over a small California town and patiently await the arrival of the train carrying Big Al to San Francisco Bay (a plot device reminiscent of the 1954 Frank Sinatra vehicle Suddenly). Watch for Anthony Zerbe and Charles Lane in uncredited roles. Parts One and Two of "The Big Train" were lated combined into a feature film and released theatrically as Alcatraz Express.
by Hal Erickson synopsis