I didn't know you were there
  Until you said "hello"
  You had been watching me
  For I don't know how long
  I hit my head against the lamp
  As by surprise I stood up
  "Don't be afraid" you said
  "It's only me, the door wasn't locked"
  
  The voice I'd heard in the hall
  Was hard to recognise
  But now we know he's onboard
  Wearing our disguise
  If only you and I could trust
  Each other through this
  Then together we could
  Work out who the enemy is