Episodes of "Masterpiece Mystery" are available to watch online at PBS.org, or the websites of most local public television stations that broadcast the series. Episodes of "Sherlock" and "Arthur & George" are available to watch, as of 2015.
PBS.org features free views of full episodes of shows in the "Masterpiece Mystery" series periodically. "Masterpiece Mystery" is also available for download through iTunes, including such series as "Endeavor," "The Escape Artist," "Inspector Lewis" and "Morse."
Amazon.com also features episodes of various "Masterpiece Mystery" series for streaming or for downloading to a maximum of two devices. There are standard definition and high definition versions, and Amazon Prime members can watch certain series for free.