Sunday, 8.30pm, Ten
This is easily one of the best crime dramas on television at the moment.
Jonny Lee Miller is superb as the eccentric, socially inept, yet brilliant Sherlock Holmes; while Lucy Liu is perfect as his enduring offsider and sober companion, Joan Watson.
The writers continue to outdo themselves creating mysteries that keep viewers guessing whodunit until the final minutes.
This week Sherlock is on the hunt for an angel of death who is killing weak and terminal patients at a hospital and making it look like they died of natural causes. There are plenty of twists and turns.