Crashdown is a refugee from the Battlestar Triton who begins serving as Sharon "Boomer" Valerii's electronic countermeasures officer (ECO) on the Battlestar Galactica after she leaves Karl "Helo" Agathon on Caprica. He resents the fact that Valerii seems to compare him unfavorably to Agathon. Over time, however, their antagonism matures into a more good-natured teasing.
Crashdown was involved in a developing romantic relationship with Ensign Davis, a junior officer on the Galactica.
Along with the Cylon spy Boomer, Crashdown leads several pivotal Raptor missions to find water and fuel supplies for the Colonial fleet.
Crashdown is a member of a three-Raptor survey part sent to examine the planet Kobol. The Cylons destroy one Raptor above Kobol and severely damage the one carrying Crashdown; the third escapes back to Galactica. The pilot of Crashdown's Raptor is killed; fortunately, Crashdown manages to guide the craft down to a crash landing on the planet's surface. He then takes charge of the survivors as they await rescue, but in the stress of the situation he makes several bad decisions, resulting in the deaths of two of his men.
The survivors soon learn that Cylon Centurions are planning to shoot down their rescue ship. Crashdown organizes the critical counterattack, but he bungles the planning, and his squad continues to lose faith in him. When the time comes to attack the Cylons, the entire team is convinced they're heading into a suicide mission. Chief Tyrol openly refuses Crashdown's orders, and Cally is too scared to move. Crashdown becomes frustrated and threatens to execute Cally unless she follows orders. Dr. Baltar saves her life by shooting Crashdown in the back, killing him. Upon returning to the fleet, Baltar claims that Crashdown had died in battle and should be honored.