En route to Sherman's Planet, the Enterprise encounters Cyrano Jones, as well as the tribbles, which haver been engineered grow to monstrous size. with two robot ships stuffed with quintotriticale, Kirk veers off course to protect Cyrano Jones when a Kilingon ship fires upon his vessel. A skirmish follows, draining the Klingon ship as its new weapon immobilizes the Enterprise. Cyrano carries a tribble predator and a collection of genetically altered "safe" tribbles. The new tribbles don't breed. They just grow fat and large.
Did You Know?
When the Klingon weapon fails (trying to stop three ships at once), a subsequent bridge scene has the blinking lights on Uhura's console briefly appear *over* her face. See more
Captain James T. Kirk
Someday I'll learn.
Aye, Captain, but you've got to admit, if we've got to have tribbles, it's best if all our tribbles are little ones.