Doctor Who Season 3 Episode 8

Joan: I found myself as part of that school, watching boys learn how to kill.
John Smith: Don't you think discipline is good for them?
Joan: Does it have to be such military discipline? I mean, if there's another war those boys won't find it so amusing.
John Smith: Well, Great Britain is at peace, long may it reign.
Joan: In your journal, in one of your stories, you wrote about next year, 1914.
John Smith: It was just a dream.
Joan: All those images of mud and wire. You told of a shadow, a shadow falling across the entire world.
John Smith: Well, then we can be thankful it's not true. I'll admit, mankind doesn't need warfare and bloodshed to prove itself. Everyday life can provide honour and valour.