American actor who played the Arkonian captain Khata'n Zshaar in Dawn and an alien kidnapper in Affliction on Star Trek: Enterprise, after guest roles in Voyager and Deep Space Nine.
Brad Greenquist is an American character actor who has appeared in three Star Trek series. He played Demmas, the Ilari heir who asks Voyager's help against a usurper, in Warlord, and the criminal Krit in the Deep Space Nine episode Who Mourns for Morn?
On Star Trek: Enterprise he is Khata'n Zshaar in Dawn, commander of the Arkonian ship that challenges Enterprise while both crews search for their missing pilots. T'Pol's patient handling of the suspicious captain wins a rare measure of co-operation.
He returned in the fourth-season episode Affliction as one of the aliens hired to abduct Doctor Phlox from a street in San Francisco on behalf of the Klingons.