ToaL I: D'you wanna come with me?

Part 1 of the Trip of a Lifetime Series. In which the Doctor ends up in interesting places and meets some interesting people; Daniel takes weirdness in stride; Sherlock deduces aliens to tears; Harry finds trouble unerringly and Jack finds rum just as easily. Par for the course, really. WARNING: this is a multicrossover and will span over several fandoms.