Fanfic: Ménage à TARDIS, Part 3 (Martha, Donna, Ten; R/NC-17; set midway through Season 4)

...s about two mates who wander ‘round looking for a … Continuum Transfunctioner, and that’s no more daft than half the things this ... furrowed his brow. “How does humanity know about the Continuum Transfunctioner?” Donna and Martha stared at the Doctor in stunned silence for ... a touch of a whine creeping into his tone. “The Continuum Transfunctioner is no laughing matter!” “Oh, of course not,” Donna ...