Sam Vartholomeos

Actor (Ensign Danby Connor) — Discovery

American actor who played Ensign Danby Connor, the young operations officer of the USS Shenzhou, in the opening episodes of Star Trek: Discovery, and later the character's Mirror Universe counterpart.

Sam Vartholomeos is an American actor whose Star Trek role is Danby Connor, the junior officer at the operations station of the USS Shenzhou under Captain Philippa Georgiou.
He appears in the two-part premiere, The Vulcan Hello and Battle at the Binary Stars. During the battle a dazed and injured Connor wanders to the brig, where he speaks to the confined Michael Burnham moments before a hull breach kills him.
Vartholomeos came back later in the first season for Despite Yourself, playing the Terran Connor who has taken command of the ISS Shenzhou in the Mirror Universe. That version attacks Burnham in a turbolift in a bid to keep his captaincy and dies in the fight.