Complex sentence: The ABC decided in mid- 1976 to cease purchasing any new "Doctor Who" episodes; this left it with the first Tom Baker (new material) and some rights to repeat the last Jon Pertwee series.
Split into simpler sentences: The ABC decided in mid- 1976 to cease purchasing any new Doctor Who episodes. This left it with the first Tom Baker (new material) and some rights to repeat the last Jon Pertwee series.