Sherlock: Season Four, Sherlock: Season Four, DVD

Two-disc set includes "The Six Thatchers," "The Lying Detective," and "The Final Problem." Season four begins with the mercurial Sherlock Holmes (Benedict Cumberbatch), back once more on British soil as Doctor Watson (Martin Freeman) and his wife Mary (Amanda Abbington) prepare for their biggest challenge yet: becoming parents. Widescreen; Soundtrack: English.