8.0/101 votes#1 - The Stranger
Season 1 Episode 6 - Aired 10/12/1974
The Marshalls meet Enik, an intelligent, time-traveling relative of the Sleestak.
Director: N/A
Writer: Walter Koenig
6.8/105 votes#2 - The Infinite Vulcan
Season 1 Episode 7 - Aired 10/20/1973
A race of plant people, and their master, have a plan to force peace onto the galaxy.
Director: Hal Sutherland
Writer: Walter Koenig
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Walter Koenig Ratings Summary
"The Stranger" is the best rated episode written by Walter Koenig. It scored 8/10 based on 1 votes. It was directed by N/A. It aired on 10/12/1974 and is rated 1.2 points higher than their second-best episode, "The Infinite Vulcan".