Notice to self: in case you’re casting a confidante, ensure the leading man likes her. As it is, Jon Pertweefailed to bond with April Walker. She had been given a role as an ace correspondent Sarah Jane Smith in 1973. Thereafter, the producer Barry Letts immediately replaced her with Elisabeth Sladen, and the rest is history.
In case you’re thinking what the show would have been like with April Walker, here she is in The Two Ronnies.
4. Christopher Eccleston and John Hurt (2013)
In 2013, Doctor Who celebrated its fiftieth anniversary. Steven Moffat reworked the end of the Time War. What’s more, we got some answers concerning a radical new Doctor that had been hidden all these years. Still, things could have been altogether different. As it is, the initial idea for Day Of The Doctor saw Matt Smith and David Tennant getting together with Christopher Eccleston, who chose not to return for the anniversary episode. This was in spite of the fact that he was ‘seventy-five percent talked into it’. Rather, Moffat cast John Hurt, who is splendid.