Josie Long presents a selection of short documentaries about communication - messages that could break your heart, rescue you from a fight or save you from a long stay in jail.
The writer Glenn Patterson explains why sometimes we should ignore the writing on the wall, and musician Tom Robinson describes the unlikely message he sent at a time when he was in a lot of trouble.
Stories of last words, lost love and lights being knocked out.
The items featured in the programme are:
Guess Who Found sound from the collection of Mark Vernon http://www.meagreresource.com/
L'Esprit De L'Escalier Produced by Hana Walker-Brown
Yanto Featuring Glenn Patterson Produced by Rachel Hooper
Message from Above Featuring Tom Robinson Produced by Alan Hall
Dear Sophie Produced by Sara Parker
Conversations with Nic Featuring Esther Baker
Produced by Eleanor McDowall A Falling Tree production for BBC Radio 4.