Quarshie has also narrated for television. His work includes the 2006 documentary "Mega Falls of Iguacu" (about the Iguaçu Falls), the 2009 adaptation of "Small Island", and the 2010 BBC Wildlife series "". In September 2010, he featured in an episode of "Who Do You Think You Are?", in which he traced his Ghanaian and Dutch origins. The episode revealed that Quarshie was part of his country's Euro-African elite as one of his ancestors, Pieter Martinus Johannes Kamerling, was a Dutch official on the Gold Coast. This also made him a distant relative of Dutch actor Antonie Kamerling.