Herbert Smith, the ‘Handcuff King’, and his girlfriend, Lottie Roberts, are circus performers who secretly buy and sell babies for profit in Edwardian Britain. But they’ll need more than a disappearing act to fight the families who come after them.

Get in touch at behaveyourself@bbc.co.uk

Presenter: Rima Ahmed Reporter: Richard Tisdale Produced by Luke de Costa Researcher: Bethan Davies Social Media: Fede Marilotti Online Producer: Lee Macaulay Executive Producer: Luke Eldridge Commissioning Editors: Gareth Hydes and Alistair Miskin

HMP Kirkham Prison governor Kerri Pegg and drug dealing gang boss Anthony Saunderson strike up a dangerous relationship.

If they're found out, it will have life changing consequences for Pegg.

Get in touch at behaveyourself@bbc.co.uk.

Presenter: Rima Ahmed. Reporter: Mat Trewern. Produced by Luke de Costa. Researcher: Bethan Davies. Social Media: Fede Marilotti. Online Producer: Rachael Smith. Executive Producer: Luke Eldridge. Commissioning Editors: Gareth Hydes and Alistair Miskin.

Former zoo worker Bradley Tomes hatches a plan to steal and sell Humboldt penguins Patrick and Penny from South Lakes Safari Zoo in Cumbria.

Get in touch at behaveyourself@bbc.co.uk.

Presenter: Rima Ahmed. Produced by Luke de Costa. Researcher: Bethan Davies. Social Media: Fede Marilotti. Online Producer: Rachael Smith. Executive Producer: Luke Eldridge. Commissioning Editors: Gareth Hydes and Alistair Miskin.