Cyborg presenter James Young journeys across the world to meet the makers and users of sex robots who have plans for a Westworld future where sex bots live amongst us. In Barcelona, James visits Dr Sergi Santos and his wife Maritsa, creators of one of the world’s most advanced sex robots and the answer, they suggest, to many couples' miss-matched libido. Sergi tests out his latest robot and James finds out how Maritsa copes with Sergi using the dolls himself. Elsewhere in Barcelona James also finds simple versions of the robots - not yet fitted with AI - being used in a brothel, and visits a professional sex toy tester who tries out one of the latest male sex dolls to hit the market. Back in the UK, James visits Sergi’s business partner Arran who has been demo’ing a Samantha robot in a sex shop near Liverpool. Arran tells James about his latest plan - to offer his sex robots to elderly people’s homes. In Japan, James meets two of the most human-like robots to have been created before discovering a darker side to the sex robot industry when he visits a factory mass-producing ultra-realistic dolls. So do we really want sex robots in our lives?