We were on the Sun Princess back in 1997 when they filmed the first episodes of "Love Boat: The Next Wave" starring the late Robert Urich. The production schedule was set up to minimize hassles to the paying passengers, but nevertheless we still had times where it impacted our cruise. I think the show lasted half a season on UPN before they cancelled it. It was pretty bad.
My highpoint was almost colliding with Robert Urich at the breakfast buffet one morning, while he was wearing his Princess Captain uniform. He was in a hurry to wolf down some food during a 10 minute break. Nice guy. Too bad he died so young.