double-agent all along. Sorenson is left alone with Griffin. Griffin reveals that he is actually visible under the facial cream, and they kiss. Sorenson happily accepts the challenge of discovering how Griffin regained his visibility. Cast Production By 1942, the United States had entered World War II, leading studios to produce films that were described by the authors of the book Universal Horrors as replacing the "cynicism of the '30s" with the "flag-waving of the '40s". This led to a combination of "horror and propaganda" that the authors described as an "uncomfortable hybrid". These films included productions at Monogram such as King of the Zombies, Black Dragons and Revenge of the Zombies with mad scientists who also worked for Nazis. Universal also made an entry into this hybrid with Invisible Agent. James L. Neibaur, author of The Monster Movies of Universal Studios described the film as not being a horror film, but "an action movie with comical touches". Invisible Agent was announced under the title The Invisible Spy in early 1942. The screenwriting team of Frank Lloyd and Jack Skirball, who previously worked on Alfred Hitchcock's Saboteur, were set to be the film's original producers but were replaced by George Waggner who was assigned the title of associate producer. The film's screenplay by Curt Siodmak has only one connection to the original Invisible Man film, with the "Frank Raymond" character who is the grandson of "Jack Griffin", the inventor of the invisibility formula. The film went into production on April 22 and finished in late May 1942 with a budget of $322,291. Jon Hall had just been put under contract to Universal. Release Invisible Agent was distributed by the Universal Pictures Company on July 31, 1942. The film was the most successful of the Invisible Man sequels and one of Universal's highest-grossing films of the season, grossing over $1,000,000 in US rentals, earning $1,041,500. John P. Fulton and Bernard B. Brown were nominated for an Academy Award for their special effects work on this film at the 15th Academy Awards, but lost to the special effects team for Paramount's Reap the Wild Wind. The film was followed by the sequel, The Invisible Man's Revenge also starring Jon Hall. The film was released on DVD on as part of the "Invisible Man: The Legacy Collection" set, which included The Invisible Man, The Invisible Man Returns, The Invisible Woman and The Invisible