... be,hmm?""Sorry, Doctor. " Vicki looked genuinely crestfallen. The Doctor turnedto Steven. "Salt water but no tides. What does that suggest to you, myboy?""No moon?"The Doctor ... them. Steven felt that he should have his ownkey, just in case anything ever happened to the Doctor. The Doctor dis-missed the idea, claiming that Steven was just scaremongering. The truthwas, ... invitation to a mystery," the Doctor replied, frowning and lookingaway.Vicki took the card from Steven. "Who gave it to you?" she asked the Doctor. "I don't… I don't...