1Dope Behind the Wheel Despite all the publicity about drink driving, there is a hidden danger - people who drive under the influence of cannabis. Why is this regarded as less serious than drink driving in the eyes of the law? One couple speak about the terrible loss of their teenage son at the hands of a doped up driver.

2Sums of Money The maths students who worked out the odds at the card tables and embarked on a career as professional gamblers in Las Vegas, driving the casinos crazy.

3Poker Faces The game of poker is no longer an old boys club - the biggest two stars of poker these days are women.

4Doctor at Large Morgan Fahey - doctor at large. Fahey has just been released from jail after serving only half of his six year sentence. Has he been rehabilitated? A look back at the undercover journalism used by 20/20 to get Fahey to confess to his crimes.