(written from a Production point of view)
John Rubinstein (born 8 December 1946; age 73) is the actor who has played three different characters on Star Trek: Voyager and Star Trek: Enterprise. His costumes as Vulcan minister Kuvak were sold off on the It's A Wrap! sale and auction on eBay.  
Rubinstein is also known to genre fans for playing Wolfram & Hart lawyer Linwood Murrow during the third season of Angel, where he frequently worked with fellow Star Trek guest star Daniel Dae Kim. In 2018 he guest-starred as lawyer Daniel Webster in the Chilling Adventures of Sabrina episode "Chapter Three: The Trial of Sabrina Spellman".