In the recreation room aboard the Enterprise, Uhura's tribble gives birth to a litter. .. According to David Gerrold's The World of Star Trek, tribble props were. Personally I find this the best/funniest episode made of Star Trek TOS. I think they must've had great fun in. Action · To protect a space station with a vital grain shipment, Kirk must deal with Federation bureaucrats, a Klingon battle cruiser and a peddler who sells furry.