When Peter threatens to vaporize an obnoxious New Yorker's pants, Egon, who is sitting atop the Ecto-1, points the red T.U. Antenna, nicknamed the 'Sniffer' at the man. This device is actually a PKE Detection Array sensor for extremely high bandwidth frequencies.
Tiamat appears as a five headed dragon-like demon in this story. In IDW's Ghostbusters comic book series, Tiamat is appears as a primal Goddess with Medusa like hair. She was the one who banished Gozer from Earth in ancient times.
The voice actors were recorded on September 24, 1986.
The RMS Queen Elizabeth 2 is visible at the Midtown Pier.