Jo Brand on Kissing, 9pm, BBC4
The comedienne explores whether kisses still have any value, or if they have become too commonplace to mean anything. She researches the history and science of kissing, including the role it plays in the animal kingdom. However, she also starts to question whether her own attitude to public displays of affection needs to change, and decides to seek professional advice on improving her kissing technique. Prisoners' Wives (BBC1, 9pm) Harriet is distraught to discover son Gavin has been attacked in prison – and the only way to protect him is to supply the bully with drugs. Pippa Haywood stars.
