At 1:30 there are a few musical notes reminiscent of The X-Files theme.
At 3:43 there are more whistled notes as from The X-Files.
At 09:07, first sight of a pool/billiard table in Cutter's establishment.
One of the movies Mendelsohn is watching is "Earth vs the flying saucers".
First time Cutter refers to Sheena's attire as a lion-skin bikini, and he says so to her.