Warner Bros.
Although Goff and Roberts considered themselves primarily comedy writers, Warners saw them as action men and assigned them to rewrite another script, a gangster story called White Heat (1949). White Heat was based on a story submitted to the studio by Virginia Kellogg, which had been inspired by a real-life robbery. Goff and Roberts turned Kellogg's story inside out, making it a semi 'Greek tragedy' about a gangster with a mother complex. James Cagney agreed to star, Raoul Walsh directed and the resulting film became an instant classic. Kellogg was nominated for an Oscar for Best Original Story, but, under Academy rules of the time, Goff and Roberts were not. In an essay on the making of the film and writing of the script, writer Patrick McGilligan observed:
Goff and Roberts regard themselves as slow, methodical craftsmen. They plot in complete detail before even beginning to write. Then they write their dialogue together, line by line. Roberts seems to be the better constructionist... Goff gets the nod for detail and dialogue. Yet they work together so closely that it is difficult to separate their individual contributions, and what usually emerges is a blending of both their selves. "Our contention, and I think it's borne out by the scripts we’ve done", said Roberts, "is that the style of the script is neither my style nor Ivan's, but a third person's."
Warners put the team on to an early draft of Mara Maru for which they were not credited. They worked on Captain Horatio Hornblower (1951), with Gregory Peck in the title role, then were reunited with Cagney on Come Fill the Cup (1951). They wrote a Joan Crawford vehicle, Goodbye, My Fancy (1952), provided the original story for a British film, Gift Horse (1952) and were among several writers on the anthology film O. Henry's Full House (1952), for 20th Century Fox.
Goff and Roberts stayed with Fox for two adventure films, White Witch Doctor (1953) and King of the Khyber Rifles (1954).
From 1954 to 1955, Goff served as president of the screenwriters' council of the Screen Writers Guild.
At MGM they wrote another adventure tale, Green Fire (1954) then returned to Warners to do a musical melodrama with Mario Lanza, Serenade (1956), from a novel by James M. Cain. At Warners they did a Civil War era saga for Raoul Walsh, Band of Angels (1957), then made a third film with Cagney, Man of a Thousand Faces (1957), a biopic of Lon Chaney which earned Goff and Roberts an Oscar nomination..
They wrote a pilot for a TV series that was never made, The Fat Man (1959). Cagney used them again for an IRA thriller, Shake Hands with the Devil (1959) and they wrote an episode of Bourbon Street Beat (1960).
1960 finally saw the release of a film version of Portrait in Black. It was produced by Ross Hunter who used Goff and Roberts on a similar thriller, Midnight Lace (1960). They wrote a third film for Hunter, a remake of Next Time We Love, for Doris Day and Rock Hudson, but it was not made.
They did the never-made The Sea Wolves about John P. Cromwell in World War II.