Somalian rapper K'Naan has headed back to his drought-hit homeland in a bid to help the country's starving population.
The Horn of Africa, including Somalia, Kenya and Ethiopia, is in the depths of a devastating drought and famine - the worst in 60 years - and millions are fleeing their homes in a bid to find refuge.
Last month (Jul11) K'Naan met with U2 frontman Bono and members of the Somalian community in the U.S. - where the rapper now lives - to discuss what action was needed to help those suffering.
And the star has decided he would be most useful on the front line, and has returned to his native country to see what aid needs to be introduced.
He says, "I came to Somalia to see the situation here and give any donation I have to the people and anything else available. I will do all I can to help my people in Somalia."
This Doctor won't be saying 'goodbye' in the same way as those who have left the series in recent years.