Earth: Final Conflict (1997)

S1E22 The Joining

While searching for lost treasure, divers discover a mysterious glowing canister. When they open it, they inadvertently release an alien entity named Ha'gel, who takes on the appearance of one crew member and eliminates the others. Boone is summoned to the scene and grows suspicious when he sees Taelon scribbling on the now-empty canister. The Taelons inform Boone that Ha'gel belongs to a notorious alien criminal faction. Concerned about the potential fallout, the Companion enlists Beckett’s assistance to handle Ha'gel. Meanwhile, Ha'gel transforms into Sandoval's likeness and confronts Beckett directly.