The actors introduced themselves, as well as the other guests. The four actors were Armin Shimerman, Mark Alaimo, Bob Picardo, and John (Ethan) Phillips. Apparently Ethan uses his middle name because there was already a well-known John Phillips.
Eric and Debra Stillwell run the cruise, although Charles C Datin and Linda Wolf organise it. David R George III is a writer, and Ronald B Moore is the Visual Effects supervisor for Voyager.
Ronald B Moore. This picture may really be from his talk.