Doctor Who: The War Games (DVD Trailer)

The Doctor, Jamie and Zoe arrive on an unnamed planet. Originally believing themselves in the midst of World War I, they realize it to be one of many War Zones overseen by the War Lords, who have kidnapped large numbers of human soldiers intending to create an army to conquer the galaxy. Infiltrating the control base, the Doctor discovers that the War Chief is also a Time Lord. The creeping realization sets in that the Doctor cannot solve this problem alone, and that his days of wandering may be at an end...