"Lock and Key" is a song written and performed by Canadian rock band Rush. It is a promotional single from their twelfth studio album, Hold Your Fire. The song deals with the theme of every human being’s primal, violent instincts underneath their civil appearance - their “killer instinct”. Critics gave the song liking reviews, with some saying it had quality of a hit single, and would make it on the Billboard Hot Mainstream Rock Tracks chart; it went on to reach number 16 on the chart. The song's music video was originally released in 1987, and was produced by Bob Jason and directed by T. Vanden Ende. The song was only played live by the band on the Hold Your Fire Tour.