The hooded vampires at the end of the episode are all wearing stylized ankhs that were the symbol for the Camarilla from the game Vampire: The Masquerade. The Camarilla was the group whose first rule, above all others, was to keep vampires hidden from humanity.
For much of the story, Rick inhabits his own youthful teen-aged body. At the high school dance (when Rick storms out), there is a student who is an obvious progeriac - a teenager inhabiting a rapidly-aging body.
Jerry's perception of Beth looks like the empress of the Racnoss from the Doctor Who (2005) Christmas episode The Runaway Bride (2006).