The Immunity Syndrome

Episode Summary & Review

Summary

Spock senses the crew of Intrepid, a starship crewed solely by Vulcans, die. Enterprise investigates, and discovers a zone of darkness which conceals the hazard: an immense yet single celled organism which drains energy from anything it encounters, as it did the Intrepid and her crew. And unless they can discover how to destroy it, Enterprise will be next. Worse, there are signs the organism has accumulated sufficient energy to reproduce…

Our Take

A genuinely creepy hour that makes good use of the show’s limited effects by keeping the monster vague and huge. Spock taking the shuttle alone is a strong stretch, and the Vulcan death-sensing opening lands harder than you’d expect. The science is nonsense but the dread feels real, and the ending is tense instead of rushed. Worth your time, easily one of the season’s better entries.