Track listing:

Single 1

• Side 1
  1. Trouble (2.39) (Lieber/Stoller)

• Side 2
  1. Your Sister's On My List (4.07) (Gillan/Towns)

Single 2

• Side 1
  1. *Mr Universe (live) (7.20) (Gillan/Towns)
  2. *Vengeance (live) (4.42) (Gillan/Towns)

• Side 2
  1. *Smoke On The Water (live) (10.10) (Blackmore/Gillan/Glover/Lord/Paice)

Vocals: Ian Gillan
Keyboards: Colin Towns
Guitars: Bernie Tormé
Drums: Mick Underwood
Bass: John McCoy

'Trouble' was released as a limited edition double single, as illustrated above. The standard version of the single did not contain the 'live' tracks

* recorded at the Reading Festival on 22nd August 1980

'Trouble' was not taken from an album, although it can be found on the 'Glory Road' CD as a bonus track

'Your Sister's On My List' appears on the 'Future Shock' CD as a bonus track

'Mr Universe', 'Vengeance' and 'Smoke On The Water' appear on the 'Mr Universe' CD as bonus tracks. Curiously, they also appear on the 'Live At Reading' CD