Sam was a male Human civilian in the 23rd century. He worked at the Janus VI colony as a miner in 2267.
That same year, he was assigned to guard duty when the mother Horta began a murderous rampage, killing fifty miners. He was relieved by Schmitter. (TOS: "The Devil in the Dark")
Sam was played by stunt actor Bob Hoy who received no credit for this part.