In that year, Sam and James Kirk, the Enterprise's captain, demonstrated some basic self-defense and throwing techniques in the ship's gymnasium for Charlie Evans, a young man whom the Enterprise was transporting to Earth Colony V. When Charlie became frustrated with his inability to master the same techniques, however, he utilized his incredible psychokinetic abilities granted to him by the Thasians to make Sam disappear, after Sam began laughing at him. Along with all of the other crewmembers affected by Charlie, Sam was restored by the Thasians when they arrived to retrieve Charlie. (TOS: "Charlie X")
This uncredited role was played by regular series stuntman Robert Herron, although reference books based on the Star Trek Concordance lists the actor playing Sam as Beau Vandenecker. The character was only referred to in the script and episode as "Sam."
The novelization "Charlie's Law" by James Blish (released by Bantam Books), he was referred to as Sam Ellis, an officer, who was part of McCoy's medical staff. Of note, a seemingly out-of-place lexicon entry for a "Mr. Ellis" also appeared in the Concordance, however the corresponding text refers rather to Tom Nellis.