Lyric discussion by shakespearewoah 

Its about the series 2 arc where they are stuck in Pete's world after they fall through a crack to that alternate universe. The Doctor notices a small glow reflected off of something or other, and realizes that the poor TARDIS is nearly dead but not quite. He gives about ten years of life to that tiny glow, and they decide to give her 24 hours to repower up so they can get the heck out of there. The last few lines would be where mickey and rose take off to seek out family members (mickey's gran and rose's dad and mum) naturally the Doctor tells them not to wander off, and naturally, they do.

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