Think you guys are probably right about when it was filmed, but I'd be curious about whether anyone knows for certain. A great interview. It really comes through that he enjoyed his time on the show, and enjoyed sharing his stories with fans.
Of the cast members that I've been fortunate enough to meet, I'd be hard put to think of anyone who isn't there because they genuinely enjoy meeting and talking to the fans (except the rude or overly possessive fans, and an actor would have to be eligible for sainthood to enjoy being subjected to that kind of nasty behavior).
Jeannie
