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Martha was gone.
Jack was a quick replacement.
''Did you want a picture? I could sign it for you'' Jack offered, folding his arms across his chest.
The Doctor was standing a foot away from him, tilting his head to the side as he looked Jack up and down.
''What are you doing?'' Jack asked eventually, smirking.
''Calculating how long it'll take you to get a big head...'' The Doctor muttered. ''but...I think you're already half way there'' he continued, grinning manically.
''Oh, I could answer that in so many ways, Doctor'' Jack grinned, patting The Doctor on the shoulder and urging him towards the TARDIS.