Yes. Apparently, the Aliens, tired of Arnie's incessant pacing around the spaceship on trips across the galaxy, abandoned him back on Earth after they injected him with a life-long serum that caused him to blurt out pointless bits of information and his connection with Phyllis was one of them. Unfortunately, it was while he was around Dan and Dwight and this caused Dwight to go into a fit of rage since Phyllis was the only woman who actually agreed to sleep with him.
Whatever happened to the sofa Bev gave Dan and Roseanne? The one that was surprisingly light for something made entirely of lead.