Haunting the Chapel is an EP released by American thrash metal band Slayer in 1984 through Metal Blade and Enigma Records. Slayer's debut album Show No Mercy became Metal Blade's highest selling, leading to producer Brian Slagel wanting to release an EP. Recorded in Hollywood the recording process proved difficult when recording drums in a studio without carpet, although it resulted in drummer Dave Lombardo meeting Gene Hoglan who was to become an influence in his drumming style and speed. However, Hoglan said he gave him a bunch of tips and never really gave him lessons; he was influenced by Slayer too.
Although originally featuring three songs, the record evidences a marked evolution from the style of their previous album, Show No Mercy, and is considered the first demonstration of the band's "classic" style displayed on later albums and is often described as a "stepping stone". The songs "Captor of Sin" and "Chemical Warfare" are regularly featured on the band's live set list. "Chemical Warfare" appears in Guitar Hero: Warriors of Rock.