Common Sense Note
Parents need to know that a subplot involves Lord Longford's investigations into the effects of pornography, and he is shown personally visiting adult bookstores, a peep show with topless dancers, and reading through pornographic magazines. There is rough language in a prison setting, with use of "s--t" and "f--k." A true-life child-killing murder spree is discussed (thankfully, not in gory forensic detail) as the ultimate in ghastly horror, and scenes of the vengeful parents are apparently actual news clips. A key character smokes frequently; it is shown to have dire effects on her health, though. The DVD, originally a movie for British TV, carries a "TV-MA" rating.
Sexual
Content
Toplessness, suggestive dancing and glimpses of naked centerfolds in pornographic magazines, during Lord Longford's anti-porn investigation. Allusions to sexual components in the serial killers' relationships and their victims, but we're spared clinical details.
Violence
We never see anything, though there is talk of past murders and threats of retaliation killing.
Language
"F--k" and "s--t" in the prison environment, plus a woman is called a "bitch."
Social
Behavior
Even though this can be taken as a cautionary tale, about Lord Longford's being too forgiving and trusting, he still comes across as a strong example of an upper-class gentleman who tries to use his high position and advantages in life to make a better existence for society's worst outcasts and sinners. Also, the largely unrepentant Hindley and Brady aren't glamorized, as fictional serial killers have come to be.
Consumerism
A few references to British TV programs, books, and magazines of the era.
Drugs / Tobacco /
Alcohol
Myra Hindley chain smokes (ultimately it impacts her health severely, though she still doesn't quit). Social drinking.