dropped. Near the end of the second season, Tyrol begins to believe he may be a Cylon sleeper agent, and begins to entertain thoughts of suicide. He viciously attacks Cally when she wakes him from a nightmare, an act which prompts him to seek religious counsel. Brother Cavil's guidance convinces Tyrol that he isn't a Cylon, and makes him aware of Cally's feelings towards him. However, the meeting with Brother Cavil later allows Tyrol to expose the priest as a humanoid Cylon when a duplicate copy returns from the Caprica rescue mission. Tyrol and Cally are among the thousands that settle on New Caprica. The two get married and have a son, whom they name Nicholas Tyrol (although Galen later learns that he is not Nicholas' father). Tyrol worked as a union leader when the Cylons arrive and occupy New Caprica. Tyrol's speech urging the union to strike shortly before the occupation begins is based on Mario Savio's "gears of the machine" address at the University of California, Berkeley. During the Cylon occupation, Tyrol served as an active member of the resistance, bombing strategic targets and recruiting new members. After the colonists escape New Caprica, Tyrol is appointed by President Tom Zarek to be a member of "The Circle," a six-person jury charged with trying and executing humans suspected of collaborating with the Cylons. When Felix Gaeta is tried, Tyrol reveals Gaeta was the "inside source" the resistance relied upon, effectively exonerating him. Soon after, The Circle disbands. Tyrol and Cally return to duty aboard Galactica. After the fleet makes its way to the algae planet, Tyrol is one of those assigned to the base camp on the planet during the algae harvesting process. He feels a compulsion to walk into the hills above the camp where he discovers the Temple of Five, a place which Tyrol's parents revered. He tries to find the location of the Eye of Jupiter within the temple but the Cylons make their move before he is able to do so and the humans are forced to abandon the temple. Tyrol cannot bring himself to activate the explosives he placed there, and by the time then-Major Lee Adama presses the detonator it is too late, the devices have been disconnected by the Cylons. Afterward, Tyrol finds Gaius Baltar within the temple and knocks him unconscious before he and the rest of the humans on the