Theory:Doctor Who audio discontinuity and plot holes/The Paradise of Death


 * The Doctor sings the lullaby from The Monster of Peladon (TV story) story here, in front of Sarah. Nice continuity reference, except that this story takes place before The Monster of Peladon, where Sarah clearly hears the lullaby for the first time ever.
 * There's no real reason for Sarah to remember this occurrence. If she does, the fear/surprise/stress she is experiencing at that moment in The Monster of Peladon could easily block the memory from her mind.