Plenty of Nothing

Bride of Frankenstein (1935)

Not Basil Rathbone, Boris Karloff and Bela Lugosi, but in fact Douglas Walton as Percy Bysshe Shelley, Elsa Lanchester as Mary Wollstonecraft Shelley (and the Bride of Frankenstein), and Gavin Gordon as Lord Byron. Source.

Transylvania 6-5000

Transylvania 6-5000, released in November 1963, was the last Bugs Bunny cartoon directed by Chuck Jones. Watch.

Madame Tussaud

Isabela Neamtu as Madame Tussaud. Source. Somebody build a horror film franchise around this woman.

Φάρσα ή κέρασμα

Source.

Elsa Lanchester

Elsa Lanchester, who played the Bride of Frankenstein in Bride of Frankenstein (1935), later appeared as the nanny who quits the Banks household and creates an opening for Mary Poppins in Mary Poppins (1964). Filmography.

Rocky Loma

Ivy Levan performs "Science Fiction Double Feature" in front of Casa Loma in Fox's remake of Rocky Horror Picture Show.

Films referenced in the song:

The Day the Earth Stood Still (1951) with Michael Rennie

Flash Gordon (1936, with sequels in 1938 and 1940)

The Invisible Man (1933) with Claude Rains

King Kong (1933) with Fay Wray

It Came From Outer Space (1953)

Doctor X (1932)

Forbidden Planet (1956) with Anne Francis

Tarantula (1955) with Leo G. Carroll

Day of the Triffids (1962) with Janette Scott

Night of the Demon (1957) with Dana Andrews

When Worlds Collide (1951) by George Pal

RKO Pictures operated from 1928 to 1957.

Werewolf of London

Henry Hull was the Wolfman in Werewolf of London (1935), not Lon Chaney. Source. Regardless, here's "Werewolves of London" by Warren Zevon. Plus! Werewolf of London trailer.

Halloween

What? AAAAAAAAAAA!!!!

Evangeline Brandt "Halloween"