Watch 50 years of regenerations in one emotional Doctor Who video

Last Saturday’s Doctor Who saw the beginning of the end for Peter Capaldi’s Twelfth Doctor, with the Time Lord beginning to regenerate into a new form (marking a mystery new actor in the series’ lead role) until surprised by the arrival of David Bradley’s earlier incarnation.

Now, we have a long five months or so to wait until we can find out what happens next – but in the meantime it seems like the perfect opportunity to reflect on regenerations and look back at what the process means for the sci-fi series.