Granted, Garson wanted all that influential a player in the world of genre. His face immediately reminds me of his funnier bits from HBO's Sex And The City serial (yes, I did watch some of it during its run). But a quick review of his IMDB.com profile shows a few footprints worthy of mention.
From his incredible run of 170 different screen credits, his first foray into our corners is a brief appearance in 1990's Brain Dead from Concorde Pictures. Also in 1990, he enjoyed some more screen time aboard Repossessed, a Horror/Comedy from Carolco Pictures. After that, small roles in such genre staples as Twin Peaks, Quantum Leap (as Lee Harvey Oswald), Groundhog Day (1993), VR.5, and Buffy The Vampire Slayer followed; and I would suspect all of these helped increase the actor's visibility within the industry. After those entries, it certainly looks like he started to get some larger roles, including appearances in Star Trek: Voyager, The X-Files, the Steven Spielberg produced miniseries Taken, and even Stargate SG-1 for good measure.
Alas, an ending awaits us all, but we'll always have his work to remember him by.