| Killer (Single Version) | 4:17 | |
| Killer (William Orbit Remix) | 6:42 | |
| Whirlpool (Live) | 4:38 | |
| Killer (Live) | 4:51 | |
| Come See What Love Has Done (Live) | 4:30 | |
| Hey Joe (Live) | 4:21 | |
| Killer (William Orbit Dub) | 5:53 |
| Title, Format | Label | Cat# | Country | Year | |
|---|---|---|---|---|---|
| Killer (CD, Maxi) | Sire Records Company | 9 40230-2 | US | 1991 | |
| Killer (12") | Sire Records Company | 0-40230 | US | 1991 | |
| Killer (12", Promo) | ZTT | SAM 902 | UK | 1991 | |
| Killer (CD, Promo) | Sire Records Company | PRO-CD-5085 | US | 1991 | |
| Killer (Cass, Single) | Sire Records Company, Sire Records Company | 4-19119, 9 19119-4 | US | 1991 | |
| Killer... Dance (12") | Warner Music UK Ltd., ZTT | 9031-75755-0, ZANG 23 T | UK | 1991 | |
| Killer...On The Loose (7") | ZTT | ZANG 23 | UK | 1991 | |
| Killer...On The Loose (7") | ZTT | ZANG 23 | Germany | 1991 | |
| Killer...On The Loose (CD, EP) | ZTT, ZTT | ZANG 23 CD, 9031-75754-2 | Europe | 1991 | |
| Killer...On The Loose (CD, Maxi) | Warner Music (Japan) | WPCR-2204 | Japan | 1991 | |
| Killer 2005 (The Remixes) (CD, Maxi, Ltd, Promo) | Warner Bros. Records | 9362 42777-2 | US | 2004 | |
| Killer 2005 (2x12") | Warner Bros. Records | O-42777 | US | 2005 | |
| Killer 2005 (2x12", Promo) | Warner Bros. Records | PRO-A-101474 | US | 2005 | |
| Killer 2005 (CD, Maxi) | Warner Bros. Records | 42777-2 | US | 2005 |
referencing Killer 2005, CD, Maxi, 42777-2