Laufeyjarson writes…

Original air dates April through May of 1973.

Original air dates February through March 1973. Nothing to do with Elite Dangerous, despite that also being Frontier in Space. This is the last serial featuring Robert Delgado as The Master, due to his untimely death in mid-1973.

Original air dates January and February of 1973. Four parts, nothing momentus recorded.

Original air dates December 1972 through January 1973. 10th anniversary special with three doctors in it, I think.

Original air dates May through June of 1972, in six parts. Watched the extras already and Katy Manning is a delight. Opens with stock footage of a volcano, again. And Earthquakes. And The Master.

Original air dates April through May of 1972 in six parts.

Original air dates February through April of 1972. A six parter, starting with green men taking over a ship, and Jo and the Doctor in a boat.

Original air dates January and February 1972. I may have seen this one before.

Original air dates January 1972. Start of season 9. More fun with UNIT. I am watching the extended Special Edition with the remastered effects and new Dalek voices.

Original air dates May and June of 1971. Five episodes in the serial. It was a dark and stormy night…