William "Spider" Scott has a spare "Y" chromosome in his cell structure, which makes him very tall but also gives him a compulsion to steal.

William "Spider" Scott (Stephen Yardley) has a spare "Y" chromosome in his cell structure, which makes him very tall but also gives him a compulsion to steal. He is in retirement after a career in crime as a cat burglar, but is enticed back to work for the British Secret Service by the shady Fairfax.—Chris Barton