This Doctor Who screencap might contain
green beret, besondere kräfte, elitesoldaten, grüne barett, spezialeinheiten, elite soldat, elite-soldat, kampfanzug, schlachtkleid, schlacht-kleid, fatigues, ermüden, and ermüdet.
Basically the story of his three companions, Rose, Martha, and Donna, and how they can never stay with him long, and the Doctor has to let them go. Made Von zcatz.