In 3.02 (TP series 3, episode 02) as the episodes are labelled in the Netherlands, we see Patrick Fischler 
whom we already know from Mulholland Drive (2001). In this first 'Las Vegas' scene (timecode 00:07:00 - 00:08:39) Fischler says (as character Duncan Todd) to his 'assistant'(?): 'you better hope you never get involved with someone like him'.
Funny, seeing the fact that Fischler's Mulholland Drive character faints upon seeing a certain 'him'. In Mulholland Drive Fischler plays the symbolic role of a character consumed by fear....
....and according to the Internet Movie Data Base character list he only plays in one episode, only in this particular part 2? See the full cast list http://www.imdb.com/title/tt4093826/?ref_=fn_al_tt_1
....and according to the Internet Movie Data Base character list he only plays in one episode, only in this particular part 2? See the full cast list http://www.imdb.com/title/tt4093826/?ref_=fn_al_tt_1
I looked into the same thing earlier! But after episode 5, only the same ten actors are listed as appearing in every episode. And since none of those included Belushi, I think it's more likely that the show hasn't made the full cast lists available for future episodes yet!
IMDb is crowd-sourced and notoriously erroneous. Don't pay attention to its information on unaired parts.
Fire walk with