A stellar cast redeems the tawdry European-filmed melodrama 3DThe Man Inside3D. Nigel Patrick plays Sam Carter, a mild-mannered British clerk who spends half his life fantasizing about stealing a valuable diamond. When he is finally able to pull off this heist, it is at the cost of another man's life. Escaping to the Continent, Sam lives like a king, throwing his money around and romancing an unending stream of willing females. Private detective Milo March (Jack Palance) suspects that Sam is in some way tied in with the jewel theft, as are several less reputable types. Among the latter category are femme fatale Trudie Hall (Anita Ekberg) and two-bit crooks Lomer (Bonar Colleano, whose last film this was) and Rizzio (Sean Kelly). Anthony Newley also shows up briefly as a comedy-relief cabbie. If 3DThe Man Inside3D seems like a dry run for the "James Bond" films of the 1960s, it may be because the film was produced by Albert "Cubby" Broccoli and scripted by Richard Maibaum, both mainstays of the Bond series.
~ Hal Erickson, All Movie Guide