A mysterious archer assassinates a bailiff, and the Sheriff of Nottingham uses the event to turn the villagers against Robin. Robin must eventually form an "unholy alliance" with the Sheriff to find the real killer.
If you meant a specific extra feature (e.g., commentary, behind-the-scenes) that includes DTS as part of a special edition, let me know and I can check the BBC DVD/Blu-ray release breakdowns. Otherwise, simply denotes a lossless/lossy surround audio option on high-quality home video releases. robin hood s01e03 dts