American actor who played Vosk, leader of the Na'kuhl faction stranded in an altered Second World War and the final adversary of the Temporal Cold War, in the Star Trek: Enterprise two-parter Storm Front.
Jack Gwaltney is an American actor who appeared in Storm Front and Storm Front, Part II at the start of Star Trek: Enterprise's fourth season.
He plays Vosk, head of a group of aliens who reject any restriction on time travel. Trapped in the 1940s, they have armed Nazi Germany in return for the materials to build a conduit that will carry them back to their own century, and the changed war has left German forces occupying part of America.
Vosk tries to bargain with Archer and then to destroy him. Enterprise attacks the facility as the conduit is powering up, Vosk dies in its destruction, and the agent Daniels tells Archer that the timeline is righting itself.