Vicki,, has slipped away with the Doctor's blessing and she journeys on to the plains where she finds Troilus and they declare their love. Moments later Troilus’ cousin Aeneas arrives with reinforcements and helps them escape the area.
Katarina was taken hostage by a man named Kirksen, and he locked himself and Katarina in an airlock. Steven pleaded with Bret Vyon, played by Nicholas Courtney, who would later become Brigadier Lethbridge-Stewart, to turn the ship around and take Kirksen where he demanded to go.
In the background, you can hear the screams of Katarina in the airlock, and by the time Bret decides to meet Kirksen’s demands, Katarina hits a button and she and Kirksen are ejected into space, much to the dismay of Steven and the Doctor. Katarina had done so in order to save her god's life and Steven (she worshiped the Doctor as the god Zeus.) The Doctor chooses to remember Katarina as "A daughter of the Gods".
There is very little footage left, but the scene of Katarina actually struggling and hitting the button exists. Besides the full length audio CDs, there are video reconstructions using still photos, and actual clips for the Dalek’s Masterplan. One of the main reasons why she belongs on the list is that she was a companion who was written out in such a tragic way. No one had ever thought about doing that up until this point.