Terror of the Autons, The Mind of Evil and The Claws of Axos use the Troughton theme on the opening titles but not the end titles as the stinger and electronic scream are present.
During the first part of the Pertwee, they swapped and changed between the version with the middle 8 and the version without. It was starting with The Time Monster they began to use the version without the middle 8 as the preferred choice.