While returning to a famine-ridden Sherman's planet with a cargo of quintotriticale, the U.S.S. Enterprise encounters a Klingon warship, commanded by Captain Koloth, who is detaining the trader Cyrano Jones. Kirk rescues Jones from the Klingon vessel and discovers him to be carrying a new breed of tribbles which have been genetically altered to slow their reproductive process. However, these tribbles are unable to resist the cargo of quintotriticale the U.S.S. Enterprise is carrying. The Enterprise crew soon realizes that the consumption causes the tribbles to grow to a tremendous size. So much so, that Jones' tribble-eating glommer is unable to devour them.

The Klingons return and demand that Kirk hand over Jones, accusing Jones of stealing the glommer from them. Instead of handing Jones over to the Klingons, Kirk returns the animal along with some of the tribbles.

Cast:

William Shatner as James T. Kirk
Leonard Nimoy as Spock
DeForest Kelley as Leonard H. McCoy
James Doohan as Montgomery Scott
Nichelle Nichols as Uhura
George Takei as Hikaru Sulu

Guest Cast:

David Gerrold as Korax
James Doohan as Koloth
Stanley Adams as Cyrano Jones

Creative Staff:

Written By: David Gerrold
Director: Hal Sutherland