The British Seven Thunders was released in the US as Beasts of Marseilles. Set in 1943, the film stars Stephen Boyd and Tony Wright as escaped POWs Dave and Jim. Hiding out in Marseilles, the two protagonists battle over the affections of local gamine Lise (Anna Gaylor). When they find the time, Dave and Jim plan an elaborate breakout for the other POWs sequestered in the French port city. After an engaging opening, the film relies upon serial-like thrills and hairbreadth escapes to keep the audience awake. Stealing the show from the nominal stars are those grand old British troupers James Robertson Justice and Kathleen Harrison.

~ Hal Erickson, All Movie Guide