be a Cylon. Adama demotes him after he refuses to calm down, thus removing him from duty on the hangar deck and is to report to Petty Officer Basim for reassignment. Tyrol sinks deeper into depression, almost committing suicide and later assaulting Baltar at one of his sermons for mentioning Cally (although Tyrol eventually accepts an apology from Baltar). When Tigh reveals himself, Sam Anders and Tyrol to be Cylons and the marines arrest the latter two, Galen smiles, looking almost relieved. After Lee Adama gives a full pardon to the final four, Galen Tyrol (before going down to Earth) was last seen in his quarters playing with his son. The feelings from his former deck crew to the knowledge of him being a Cylon are not yet known. When on Earth, Tyrol explores the area he is in and is drawn to the remains of a wall that has a silhouette burned into it that matches his shadow exactly. Upon touching it, Tyrol experiences a flashback of his life on Earth 2000 years ago. He is strolling down a crowded market street when he is suddenly engulfed by a nuclear explosion. Tyrol then realizes he and the rest of the Final Five Cylons had previously lived past lives on Earth, though he is unsure how they found their way to the Colonies. In "A Disquiet Follows My Soul", when his son, Nicholas, is in sickbay with acute renal failure and brought to Doc Cottle for treatment, Galen discovers Nicholas is not his son, but the son of Brendan "Hot Dog" Costanza, who Cally had a brief fling with just before marrying Galen. During the mutiny onboard Galactica, Tyrol sides with Adama and using his intimate knowledge of the ship, is instrumental in helping end the conflict. He helps Roslin escape the ship and during the standoff between Galactica and the rebel Cylons, disables Galactica'''s FTL drive to keep it from escaping. He is dismayed to notice metal fatigue in the engine room. Tyrol is reinstated to duty, with full rank, by Admiral Adama, who charges Tyrol with fixing the damage to the ship. In "No Exit", Samuel Anders reveals Tyrol and Tory used to be "madly in love" 2,000 years ago (before their memories were wiped by John Cavil). Tyrol chuckles at the idea. In "Deadlock", Tyrol comes face to face again with Boomer who has brought Ellen Tigh