What's the connection between a space capsule that returns minus its crew and some friends who go on a cave-exploring trip? Apparently it's a mysterious rock the spelunkers find and the deadly extraterrestrial creatures that emerge from it. What's the connection between the 1979 film "Alien" and this Italian-made sci-fi shocker? None, really, but that doesn't mean you won't be screaming. Mark Bodin, Belinda Mayne, Roberto Barrese star. AKA: "Alien Terror," "Strangers." 85 min. Widescreen; Soundtrack: English.