Imposter

Spence Olham is confronted by a colleague and accused of being an android impostor designed to sabotage Earth's defences. The impostor's ship was damaged and has crashed just outside the city. The android is supposed to detonate a planet destroying bomb on the utterance of a deadly code phrase. Olham must escape and prove his innocence, providing he is actually Spence Olham. Olham tries to prove he is the real Olham by finding the crashed spaceship and recovering the android's body.