He starred opposite Virginia Mayo in "Congo Crossing" (1956) and was second-billed to Chandler in Universal's expensive war epic "Away All Boats" (1956). He was Esther Williams's leading man in "The Unguarded Moment" (1956), which starred a young John Saxon. He had top billing in "Four Girls in Town" (1957) and "Man Afraid" (1957). Nader supported Audie Murphy in "Joe Butterfly" (1957), a military comedy. He had the lead in "Appointment with a Shadow" (1958) and "Flood Tide" (1958). He was Hedy Lamarr's love interest in "The Female Animal" (1958), replacing John Gavin. He had the starring role in "Nowhere to Go", a 1958 British crime drama featuring the screen debut of Maggie Smith.