Jonesing for John? Missing Mycroft? Hankering for Holmes? As we wait and hope for a new season of Sherlock from WGBH’s Masterpiece, let’s refresh our memories and rewatch season four! Everyone’s favorite detective, Sherlock Holmes, is back on British soil once again, as Doctor Watson and his wife Mary prepare for their biggest challenge yet: becoming parents. The unconventional sleuth, played by Benedict Cumberbatch, takes on the case of finding out who is smashing head statues of late British Prime Minister Margaret Thatcher. Look for an unexpected twist as the challenges of crime fighting and parenthood collide in the popular series.

Watch it tonight at 9pm on WGBH 2.