The voice actors were recorded on July 14, 1986.
The Ghostbusters use a handheld computerized version of Tobin's Spirit Guide.
Ray mentions low income housing on 150th Street. This is in Harlem.
Peter mentions two variants of Poker, Liar's Poker and Twist, when Lord Kildarby proposed a wager.
Peter then referred to Kildarby as "his Blarneyship," a reference to an Irish town and its famous Blarney Stone alleged to grant people the gift of persuasion.