"Fear (of the Unknown)" is a U.S.-only single written and recorded by English rock band Siouxsie and the Banshees and produced by Stephen Hague.

[1] The track, in its original form, was an uptempo dance-oriented number with heavy percussion work by Banshees drummer Budgie.

For its release as a single, "Fear (of the Unknown)" was drastically remixed by Junior Vasquez to accentuate its 4/4 rhythm and give it a house music feel.

When included on the 1992 compilation album Twice Upon a Time - The Singles, the track was presented in the "House of Fear Mix", the one which had been used for the promo video.

The cover art is an homage to James Stewart's dream sequence in Alfred Hitchcock's film Vertigo.