Mulder and Scully investigate about a killer who has the power to persuade people with his voice. Svengali is shown on TV when they storm the killer's apartment. Scully even said the name of the movie when she saw it.
The titles are nearly identical. Both plots involve a hypnotist enabling singing. Singer in the movie is blonde; mouse wears a similar blonde wig. The exact same song is sung (see soundtracks section).