Harry Sullivan (Doctor Who)
Harry's last regular appearance is in the season thirteen opener Terror of the Zygons, which had actually been made at the conclusion of the twelfth production block and held over to start the following season. At the conclusion of this story he chooses to return to London by train rather than by TARDIS with the Doctor and Sarah-Jane, who continue their adventures without him. He does, however, reappear three stories later in The Android Invasion, both as the original Harry and an android double. This is the character's final appearance in the programme.