Cranker was part of a team led by Sergeant Zhao Heng Lopez sent to investigate a prison ship found in the Halo debris field. Cranker and some other Marines were left to guard the Pelican. They were overrun by the Flood. Later, the combat form of Cranker returned to the pelican, captured Burgundy, and took her to the Proto-Gravemind. Cranker was destroyed by Benti, Clarence, Rimmer, and the Sangheili "Henry."