Also there is a 1960's featurette included on the northern lights that is enjoyable too.

并且还有一部20世纪60年代描绘北极光的短片，也很有观赏性。

Featurette: The Invasion: Snatched - How do you invade without ships, planes or bombs?

致命入侵:-如何做到没有舰队入侵，是计划或炸弹？