planet's surface return to Galactica as the local star goes supernova. Tyrol and Cally have a rough patch in their marriage caused by Tyrol always volunteering the two of them for additional duty instead of spending time with their son. They get locked in an airlock losing atmosphere due to a damaged patch. Admiral Adama decides the best way to rescue them is to blow the main hatch and catch them in a waiting raptor. After they are caught, they are rushed to sick bay for treatment. Seelix brings his son to him in sick bay and he renews his commitment to his family and marriage. After a problem arises with the tylium refinery, Tyrol organizes a general strike to protest the working conditions. When Admiral Adama threatens to shoot Cally, Tyrol backs down. He then has a meeting with President Roslin to discuss working conditions, replacement personnel, and training. In the cliffhanger Season 3 finale, "Crossroads, Part II", he, along with Samuel Anders, Saul Tigh, and Tory Foster become aware that they are Cylons, based on hallucinatory music (which turns out to be a cover of "All Along The Watchtower" written by Bob Dylan) that only they can hear, and a "switch" Tyrol believes has gone off within them. At the start of season 4 Tyrol and the other three Final Five Cylons begin meeting in secret. In "The Ties That Bind" Tyrol's wife Cally becomes suspicious of him being away from her all the time. After seeing him meeting in the bar with Tory, she believes he is having an affair. However, she later listens in on a meeting between Galen, Tory and Tigh and finds out her husband is a Cylon. After he returns to their quarters she knocks him out with a wrench and takes their child to commit suicide in an airlock. However, Tory comes and punches her out, takes the baby and then opens the air lock killing Cally. In "Escape Velocity", Tyrol gives a eulogy for his wife and is obviously deeply affected by it when it affects his work. Later, Admiral Adama comes and meets him in the bar telling him he can take time off or have more work, whichever he needs. Tyrol then imagines Adama saying it was his fault Cally died and he goes ballistic, ranting and raving about how he settled for Cally because Boomer turned out to