 Some original costumes were found for the Klingons while others were made from patterns created by Robert <unk> . Greg <unk> created new models of the Enterprise as well as Deep Space Station K7 and the Klingon cruiser , while 1 @,@ 400 tribbles were purchased from a company owned by Majel Barrett . Charlie Brill returned to Star Trek to appear once more as Arne Darvin , and <unk> L. <unk> was cast in part due to her being friends with one of the production crew members . Walter Koenig , who portrayed Ensign Pavel <unk> in The Original Series , showed the Deep Space Nine cast how to work the consoles on the Enterprise sets . 
