Observer by Gary Numan Overview Tag Appears on 1979 - The Pleasure Principle 2003 - Scarred: Live at Brixton Academy Disc 2 Pleasure Principle Scarred Scarred: Live at Brixton Acade Scarred - Live At The Brixton Academy (CD 2 of 2) The Pleasure Principle The Pleasure Principle (2009 Beggar's Banquet) The Pleasure Principle [2009 remaster] The Pleasure Principle (2015 Beggar's Banquet) The Pleasure Principle (30th Anniv 2CD Ed) - CD1 The Pleasure Principle (Bonus Tracks) The Pleasure Principle (Expanded Edition) The Pleasure Principle Live The Pleasure Principle (UK) Playcount 356 Listeners 139