Commander Strax was a Sontaran commander who was forced to serve as a nurse restore the honour of his clone batch. He fought and died at the Battle of Demons Run, to repay the Doctor, whom he owed a debt to for saving his life. Strax was later resurrected by Vastra and Jenny Flint and lived in Victorian London with them, acting as their butler. -TARDIS Data Core
This work was particularly complex, the wrinkles posed quite a a difficult challenge for me.
This was done over the course of about 14 hours.