Sledge Hammer! (1986)

Season 1: Episode 7

Hammer and Dori are assigned to locate a serial killer who is bumping off Elvis impersonators. In order to flush out the killer Hammer attends The Famous School For Elvis Impersonators where all the victims were once students. Complete with sequins and pompadour, Hammer enters an Elvis contest and sings The Battle Hymn of the Republic… setting himself up as bait.