Season: 1

Original Airdate:March 2, 1967

Writer(s): Teleplay: D. C. Fontana
Story: Nathan Butler and D. C. Fontana

Director(s):Ralph Senensky

Guest Stars
Jill Ireland as Leila Kalomi
Frank Overton as Elias Sandoval
Grant Woods as Lt. Kelowitz
Michael Barrier as Lt. DeSalle
Dick Scotter as Painter
Eddie Paskey as Crewman
Walter Edmiston as Voice of Transporter Chief

Stardate: 3417.3–3417.7

Synopsis: The crew is possessed by spores on an agricultural planet.

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