Natasha Powell

Tim: [voiceover] And so he told me his secret formula for happiness. Part one of the two-part plan was that I should just get on with ordinary life, living it day by day, like anyone else.

Tim: [voiceover] But then came part two of Dad's plan. He told me to live every day again almost exactly the same. The first time with all the tensions and worries that stop us noticing how sweet the world can be, but the second time noticing. Okay, Dad. Let's give it a go.

[Tim has just learned his dad is dying of cancer]

Tim: It's just... I though with the time thing...

Dad: No, I never said we could fix things. I specifically never said that. Life's a mixed bag, no matter who you are. Look at Jesus: he was the son of a God, for God's sake and look how that turned out.

Tim: I know... You must see I feel a bit cheated.

Dad: Don't. In fact, feel the opposite. The only people who give up work at 50 are the time travelers with cancer who want to play more table tennis with their sons.