★ 6.2
★ 5.6
★ 5.1
★ 9.0
★ 7.4
★ 6.6
★ 6.0
★ 7.2
★ 0.0
★ 7.0
★ 2.0
★ 7.9
★ 5.3
★ 6.5
★ 5.0
★ 7.3
★ 6.1
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.
