The shot on TV with Heckel and Jeckel in the apartment is actually a snippet from Reservoir Dogs (1992). This is because the director could only use stock from other films owned by Artisan Entertainment.
Christopher Walken appeared in The Dead Zone (1983). His role therein was frequently parodied by Jay Mohr on Saturday Night Live (1975). Cast member Sean Patrick Flanery appeared in the television series 'The Dead Zone (2002)(TV)'.