The final programme in The Dark Side of Modern Love examines asphyxiophilia, or 'breath control play', a practice involving asphyxiation that can deliver heightened sexual sensations, but can also result in death. The film features contributions from psychologists, sexologists and devotees of the most dangerous sex game of all and follows the tragic consequences that can occur when it all goes wrong. Death by Sex looks at the risks involved and how far-reaching the consequences can be for those who begin as loving partners and end up criminals. Steven is currently serving seven years for the manslaughter of a gay lover who crossed America to experience breath-control; Robbie has recently been released after serving a nine-year sentence following the death of his long-term lover; and Joseph's third wedding anniversary night ended in the death of his soul mate.

Sex Addict explores the compulsive and destructive nature of sexual addiction and follows Mark and Connie as they battle to deal with Mark's sex addiction. The couple embark on an intensive counselling course, which proves to be an emotional rollercoaster for both of them. Mark is forced to deal with difficult events in his past and Connie must face the lies and deceit that have plagued their relationship. By admitting his problem Mark begins the long process of defeating his compulsion and saving his marriage.

Fatal Attraction looks at the changing attitudes towards casual sex and explores the long-term and shocking consequences that people have experienced following one seemingly frivolous night of passion. Couple Chay and Michelle were still facing the repercussions of Chay's one night of passion three years later, as his former fling embarked on a terrifying stalking campaign. When Steven succumbed to a friend's provocative advances, he was faced with a false rape allegation a month later. Carefree 20-year-old Rogan's seemingly innocent one-night stand resulted in him becoming a father a little sooner than expected. And 25-year-old Sylvia, finding herself too busy to meet men, places adverts on the internet for casual sex, which she considers the quickest way to satisfy her desires.

Sleeping with Teacher is an intriguing portrayal of four very different true stories of teacher-pupil relationships. Through personal interviews with both pupils and teachers, this fascinating documentary explores all sides of the controversy. Former music teacher John, aged 43, began a relationship with his 16-year-old pupil Claire. Claiming they are in love, they have maintained their relationship despite constant hounding from the press and living amongst a disapproving community. English teacher Lucy is still a registered sex offender seven years after her relationship with a 15-year-old boy. Meanwhile, Rachel's story highlights why society fears such relationships: she was just 16 when her PE teacher seduced her. And teacher Jonathan describes how harrowing it can be to face false allegations of sexual assault.