The Traitor
For the final voyage of the Starship Enterprise-A, the crew was joined by an all-new Vulcan character, Valeris. A protege of Spock's, Valeris became the new helmsman for the Enterprise, replacing the promoted Captain Sulu.
Played by "Sex and the City" actress Kim Cattrall (long before she donned her Jimmy Choos), Valeris brought a smart and distinctly sexy vibe to Star Trek. Unfortunately, she also brought a traiterous streak as she acted as an integral part of a conspiracy to bring down the Klingon Empire.
This version of Valeris' Starfleet uniform was earlier worn by Kirstie Alley as Saavik in "Star Trek: The Wrath of Khan". Cattrall's initials appear inside the jacket and her full name is on tags in the pants and shirt. The jacket has been photo matched to high-rez PR photos taken during the production of "Undiscovered Country".
The uniform presents a strange blend of uniform elements, combining the bright red shirt and pant stripes normally seen on a Starfleet cadet, with gray offficer's departmental straps. No other uniform ever featured this specific mix of parts. I suspect it was done purposely by director Nick Meyer to have Valeris stand out from everyone else in a way that normal accessories couldn't achieve.