An army lieutenant can see death on the faces of his fellow soldiers before they actually die, something that causes him considerable distress. He expresses his concern to his commanding officer (Dick York, also in A Penny for Your Thoughts from Season 2), who doesn't quite know whether to believe him or not.
He starts to believe when they go to a hospital and it happens again, then when he is told of his own impending doom just before they go into another battle, so he leaves his own possessions - some pictures and a wedding ring - behind, just in case. As it turns out, the soldier can predict the death of people, so it was a good idea.
The juicy twist comes at the end, where the soldier is shipped of for some rest, but before he goes he looks in the mirror and sees his own face, which naturally has "the look", so he knows he won't make it for the promised rest. The talk then is to be safe on the ride, and to avoid the land mines, so you know what's in store, but it's a good ending nonetheless.