Supernanny at 20: Is the naughty step out of date or do we still need Jo Frost’s help?

I find that disrespectful what you’re doing right now. Will you calm down? I’m talking to you!” Jo Frost, parenting guru, kid-wrangler extraordinaire and star of Channel 4’s hit Noughties TV show Supernanny, is laying down the law. But in this instance, it’s not a badly behaved toddler that she’s taking to task. It’s a grown adult.