Ask celebrated "Die Hard" and "48 Hours" screenwriter Steven de Souza about the theme of his new, episodic online series "Unknown Sender," and he'll tell you it's simply an old favorite -- but with a modern-day twist and some familiar faces.

"Back in the day, we had a show called 'The Twilight Zone,' where strange stories took place in that conceptual domain called 'The Twilight Zone,'" de Souza told MTV. "We also had another domain called 'The Outer Limits' -- which was maybe two freeway exits past Twilight Zone. But what is the domain where strange, weird things come to us in the Internet age? You already know the answer: 'Unknown Sender.'"

The sixth episode of "Unknown Sender" goes live today, and like many of the other series sharing a home on Strike.TV -- the online "channel" conceived during the '07-'08 strike by members of the Writers Guild of America -- it features a cast of notables from the television and film industries. After the jump, check out a new image from the latest episode, "Spin Cycle," featuring Mindy Sterling (Frau Farbissina in the "Austin Powers" films) and comedian Jay Davis ("Tourgasm"). Read more...