Leena Dhingra credited as playing...
Miss Chandrakala
- The Doctor: She'd just discovered that her husband was having an affair.
- Donna Noble: You'd never think to look at her, smiling away.
- The Doctor: Well, she was British and moneyed. They carry on, except for this one time. Nobody know what happened. She just vanished.
- [Flashes back with a series of newspaper headlines about Agatha Christie's disappearance. The scenes shown are overlayed by a narration from the Doctor]
- The Doctor: Her car will be found tomorrow morning by the side of a lake. Ten days later, Agatha Chrstie turns up in a hotel in Harrogate. She said she lost her memory. She never spoke about her disappearance until the day she died. Or whatever it was...
- Donna Noble: It's about to happen.
- The Doctor: Right here, right now.
- Miss Chandrakala: [rushes straight from the library] Professor! The library! Murder! MURDER!
- [the Doctor and Donna rush into the library and look at the body]
- The Doctor: Blunt instrument. Watch broke as fell, time of death was at a quarter past four.
- Donna Noble: Lead pipe. Only Hercule Poirot, but I reckon that's blunt enough.