Earth: Final Conflict - Season 1 - Eps 22: The Joining
Divers stumble across a strange radiant canister while searching for sunken treasure. Upon opening the canister an alien being known as Ha'gel is released from its prison and assumes the identity of one of the crew and destroys the others. Boone is called to the crime scene and his suspicions are raised when he finds Taelon writing on the empty canister. Upon questioning, the Taelons tell Boone that Ha'gel is the last of an alien criminal caste. Afraid that Earth will learn the truth, the Companion's recruit the help of Beckett to deal with Ha'gel. Ha'gel assumes Sandoval's form, and confronts Beckett.
About Earth: Final Conflict

Title: Earth: Final Conflict
First Air Date: 1997-10-06
Last Air Date: 2002-05-20
Status: Ended
Rating: 6.7/10 (from 87 votes)
Language: EN
Seasons: 6
Total Episodes: 110
Network: CTV Syndication CTV Two
Genres: Sci-Fi & Fantasy, Drama, Action & Adventure, Mystery
Production Companies: CTV, Alliance Atlantis, Atlantis Films, Chum Television, PolyGram Filmed Entertainment, Roddenberry Entertainment, Tribune Entertainment, Tele München
Synopsis
Years ago, the Taelons came to Earth, offering friendship and technology to humanity. But there are those who believe the Taelons have more sinister motives.
Cast

Jayne Heitmeyer
Renee Palmer

Von Flores
Ronald Sandoval

Alan van Sprang
Howlyn

Melinda Deines
Juliet Street

Guylaine St-Onge
Juda