The face in Lee's life he's known the longest, someone from as far back as he can remember. When his eyes settled on the elder Adama, he knew it was his father. There were glimpses of memories, bits and pieces that he doesn't know what to make of. Still, seeing Bill standing there and hearing what the L on his dog tags stands for, Lee knows this is the first person he can be sure of.

His father.

"Dad," he says simply, closing the distance between them to embrace the older man without any hesitation.