After Martha Jones parts company with the Doctor, his TARDIS collides with another, and he comes face to face with one of his previous incarnations.
| Actor | Role |
|---|---|
 David TennantThe Doctor (10) | The Doctor (10) |
 Peter DavisonThe Doctor (5) | The Doctor (5) |
 Freema AgyemanMartha Jones (archive footage / uncredited) | Martha Jones (archive footage / uncredited) |