 Odo gets a visit from Dr. Mora Pol, the scientist who researched him in a laboratory on Bajor. Mora still seems to be unhappy with Odo s decision to leave for Deep Space Nine and Odo is still not happy with the way the scientist treated him. Mora gets him interested to resume work on finding his origins when he tells him a Bajoran science probe recently scanned a planet in the Gamma Quadrant and found DNA patterns looking just like Odo s. Sisko agrees to let Odo, Mora, Dax and the Bajoran doctor Weld take a runabout. On the planet they find a mysterious pillar and Dr. Weld finds the life-form the team is looking for. They decide to beam the pillar and the life-form on board and take them to DS9.