The Door Into Summer

This film is a direct-to-video adaptation of Robert A. Heinlein's classic science fiction novel. It tells the story of Douglas Niles, a brilliant inventor who invents a time machine. He is betrayed by his partner and assistant, who steal his inventions and leave him stranded in the future. Douglas must then find a way to return to his own time to expose the culprits and reclaim his life and work.

As a low-budget, direct-to-video release from 1981, 'The Door Into Summer' received very little critical attention upon its release. Information regarding its reception is scarce, and it is largely considered a minor or obscure adaptation of Heinlein's work, often overshadowed by other adaptations of the author's more famous novels.

• Lacks the depth and scope of the original novel.
• Production values are commensurate with its direct-to-video origins.
• Fails to capture the charm and wit of Heinlein's writing.

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This film adaptation is one of the lesser-known attempts to bring Robert A. Heinlein's works to the screen, often overlooked by fans of the celebrated science fiction author.