Unanswered questions galore.
Just seen this film, and cracking though it was it did leave me asking a few questions.
Who were the invaders and were their motives simply to destroy life on Earth?
Who exactly was Taggert? Why was he acting so shiftily? His reaction to Mel burning the money suggested a criminal of some type, perhaps?
How did he survive the gas attack? I don't remember that question being answered.