A couple more I can't get (as well as the Supernova question below) - these are quotes:
Who said "The rule of stalking is to imagine you are the thing that is being stalked"? Mark Chapman, Bill Oddie, Michael Portillo? I'd imagine Mark Chapman.
Who said this skill is "all about taking your time, keeping on trying and not losing your temper"? Love-making per Peter Andre, bushcraft per Ray Mears or snail-farming by Michael Parkinson. I'd assume Ray Mears?
If the answer's Human Remains wouldn't the question have asked for the connection between Rob Brydon and CSI and not mention Supernova? (I don't have a better answer by the way!)