Viggo Mortensen

Before 2364
Due to an as-of-yet unexplained temporal incident, actor Viggo Mortensen of Lord of the Rings fame found himself in the 24th century. He joined Starfleet and ended up serving on the USS Stargazer as its weapons officer until its destruction in the Battle of Maxia.

2364
In 2364 he joined the USS Hood as its new XO, coming aboard from Starbase 74.

Fascinated with Klingon culture, he transferred his swordsmanship skills learned from filming the LOTR films to practicing with the bat'leth, and keeps one in his quarters. A big fan of Klingon opera and gagh.

Disclaimer
(In case it needs to be said, this is purely parody fiction: Last we checked actor Viggo Mortensen did not disappear from the 21st century due to a temporal mishap.)