The episode was remade as Dead Woman's Shoes/Wong's Lost and Found Emporium (1985) and Dead Man's Eyes (2002). This makes it the only episode to have appeared in all three series.
When Dagget asks his name, Nathan says "Kilroy". This could be a reference to the WW2 urban legend, Kilroy was here. And one theory is Kilroy was thought to be an allied spy.
Another Twilight Zone featuring multiple actors who would later appear in Star Trek (1966). Warren Stevens was Rojan in By Any Other Name (1968). Joan Marshall played Lieutenant Areel Shaw in Court Martial (1967). Joseph Mell played an interplanetary Trader from Earth in the series pilot, The Cage (1966). His scenes from the pilot also appear as footage edited into the first season episode The Menagerie: Part II (1966).
Warren Stevens (Nathan "Nate" Bledsoe) would later play Major Whitmore in A Day in Beaumont/The Last Defender of Camelot (1986).