| recordings |
|---|
| 1964-11-24 – 1964-11-25 | I Want You Back Again | | The Zombies | 2:15 |
| 1964-11-25 | I Want You Back Again (alternate version) | | The Zombies | 2:11 |
| 1964-11-25 | I Want You Back Again (alternate) | | The Zombies | 2:10 |
| 1965-03-02 | I Want You Back Again | | The Zombies | 2:16 |
| 1997-02-07 | I Want You Back Again | cover and live | Tom Petty and the Heartbreakers | 3:05 |
| 1997-02-07 | I Want You Back Again | cover and live | Tom Petty and the Heartbreakers | 2:54 |
| I Want You Back Again | | The Zombies | 2:09 |
| I Want You Back Again | | The Zombies | 2:10 |
| I Want You Back Again | | The Zombies | 2:16 |
| I Want You Back Again | cover and live | Tom Petty and the Heartbreakers | ?:?? |
| I Want You Back Again | | The Zombies | 2:15 |
| I Want You Back Again | | The Zombies | 2:14 |
| I Want You Back Again | | The Zombies | 2:14 |
| I Want You Back Again | | The Zombies | 2:12 |
| I Want You Back Again | | The Zombies | 2:09 |
| I Want You Back Again | | The Zombies | 2:16 |
| I Want You Back Again | | The Zombies | 2:14 |
| I Want You Back Again | cover and live | Tom Petty and the Heartbreakers | 3:49 |
| I Want You Back Again | cover | Tom Petty and the Heartbreakers | 4:01 |
| I Want You Back Again (5.1 mix) | cover and live | Tom Petty and the Heartbreakers | 2:53 |
| I Want You Back Again (2015) | | The Zombies | 3:35 |
| I Want You Back Again (alternative version) | | The Zombies | 2:10 |
| I Want You Back Again (single version) | | The Zombies | 2:16 |
