All this is a bit complicated for me to edit and add but this has 4 parts but only 2 are listed on here knocking the actual episode orders out for the rest of the season off by 2 episodes
It should be E11 - 14 Resurrection of the Daleks Parts 1-4, E15 - 18 Planet of Fire Parts 1-4 , E19 - 22 The Caves of Androzani Parts 1 - 4 And finally Colin Baker the 6th Doctors first episode series E23 - 26 The Twin Dilemma Parts 1 - 4 ending season 21
It should be E11 - 14 Resurrection of the Daleks Parts 1-4, E15 - 18 Planet of Fire Parts 1-4 , E19 - 22 The Caves of Androzani Parts 1 - 4 And finally Colin Baker the 6th Doctors first episode series E23 - 26 The Twin Dilemma Parts 1 - 4 ending season 21