David Hurst, who played Justin Collins and numerous theatre, film and other TV roles, passed away on September 15 in Berlin, where he has lived since 2000. He was 93.
Obits in German:
https://star-trek-tafelrunde.blogspot.com/2019/09/DavidHurst.html
https://www.warp-core.de/news/david-hurst-verstorben/
with thanks to Kosmo
He's one of the only people to appear on both the original Star Trek and Dark Shadows. I'm trying to remember if there was anyone else.Philip R. Allen was a cop in a DS episode and Captain Esteban Star Trek III, so he appeared in a movie with most of the original series cast. He was also in Washington Behind Closed Doors with David Selby, Lara Parker, and Thayer David.