2/5 King commits to leading a march in Memphis on behalf of striking sanitation workers.
BBC Radio 4 Extra
3/5 Martin Luther King and Eric S Galt, aka James Earl Ray, both arrive in Memphis.
Claudia Hammond on new research that could prevent ear worms, plus how to be invisible. (R)
BBC Radio 4
1/5 The breakthroughs that have transformed AIDS from a death sentence to a treatable disease
BBC World Service
Dr Aaron joins Aled and Radha to discuss mental health and keeping the mind happy.
BBC Radio 1