Daniel Mays 'underestimated' psychological effects of playing 'monster' John Worboys 7 May 2026 Believe Me star Daniel Mays "underestimated" just how much it would "psychologically" affect him "humanising a monster" while playing 'black cab rapist' John Worboys in the new ITV series, and he sought help from a counsellor to get him through the hard-hitting taxi scenes. Daniel Mays Daniel Mays "underestimated" just how much it would "psychologically" affect him "humanising a monster" while playing 'black cab rapist' John Worboys in new ITV series Believe Me.