This episode stars Nick Adams and Nancy Malone, as two combatants forced to defend the Earth in a battle to the death with two creatures from another world. Not as much fun as it sounds, and things do not end in predictable fashion. Nancy Malone starred on the series NAKED CITY, and had starred in a forgotten thriller in 1956, "Fright" (not to be confused with the 1971 babysitter played by Susan George). This was the first brush with sci-fi for Nick Adams, former friend of the late James Dean, and star of the fine Western teleseries THE REBEL. Following an appearance on "Voyage to the Bottom of the Sea," he would journey to England to co-star with the great Boris Karloff in "Die, Monster, Die!" (1965). From the star of the 1931 "Frankenstein," he then rushed off to Japan to headline "Frankenstein Conquers the World," "Monster Zero" (a Godzilla epic released in the US two years after his untimely death), and "The Killing Bottle," a very obscure spy thriller never released in the US. He even fell in love with his beautiful Japanese co-star, Kumi Mizuno, a much-loved, long-time veteran of numerous Toho features, who unfortunately was already engaged to someone else. Back in the US, Adams completed one more sci-fi adventure, "Mission Mars" (1967), joining Darren McGavin in Miami for a quick shoot, and made his last film in Mexico, "Los Asesinos," shortly before he was found dead in his apartment by his manager, victim of an accidental overdose of prescribed medications. He was the first American actor to actually travel to Japan to shoot his scenes, followed by Russ Tamblyn, Rhodes Reason, Joseph Cotten, Cesar Romero, Robert Horton, and Richard Jaeckel, not to mention Luciana Paluzzi, all of whom lent international credibility to the increasingly silly Japanese monsters.