Trivia / Star Trek S2 E18 "The Immunity Syndrome"

• Prop Recycling: The equipment inside the shuttlecraft included computer banks that were previously seen in the Starbase operations room "The Menagerie, Part I" and the Eminian war room in "A Taste of Armageddon".
• Science Marches On: Spock reports the dimensions of the giant space amoeba in miles. Most scientists prefer the accuracy of the metric system and would use kilometers instead. Especially noticeable since kilometers were used earlier in the episode when reporting how far away the thing was.
• Throw It In!: The script ended simply with Kirk ordering the Enterprise to proceed to the Starbase 6. The 'tag bit' of Kirk looking at the aforementioned young woman and repeating his line from the teaser about hoping to "get some rest on a lovely planet" was improvised by William Shatner and Joseph Pevney on the set.
• This episode was nominated for an Emmy for special effects created by Van Der Veer Photo.