Katarina plays a more significant return in the audio "Daughter of the Gods", when a piloting mistake caused by later companions Jamie McCrimmon and Zoe Heriot causes the Second Doctor's TARDIS to crash into the First's, causing the First Doctor, Steven and Katarina to crash-land on the planet Urbania before they get to Kembel. As a result, the trio spend three months on Kembel while the Doctor constructs a new dematerialisation circuit to repair the damaged TARDIS, with the Doctor giving Katarina some lessons, but when the Second Doctor arrives on Urbania as the Daleks attack the planet, the older Doctor reveals what should have happened before his interference. The First Doctor resolves to find another way, but once the Second explains the situation to Katarina and expresses his regrets, Katarina accepts that there is no other choice and joins him and his companions as they use the First Doctor's repaired dematerialisation circuit to reactivate the Second's TARDIS so that he can undo the earlier mistake. The audio ends with the implication that, while the events have been erased from history with the restoration of the original timeline, the Second Doctor at least retains some memory of what just took place, as he reflects that he will never forget Katarina.