He discovers that Sam has a daughter, Carla (Leighton Meester), born nine months after he left; but it is later revealed that Glen, not Hank, is Carla's father.
Sam has a daughter (Leighton Meester), born. He left. He discovers this. Carla is a daughter. Glen, not Hank, is Carla's father. This was what it is later revealed.