David's friend Charlie Gilman stands accused of murdering Fred Wilk, and district attorney Slater is determined to convict. But David knows that Wilk was an invader - and if necessary, he'll use that defense. Then David comes to suspect that Slater himself is an invader. He sets a man to researching Wilk's background, and the man turns up evidence that part of that background was faked - and then suffers a mysterious cerebral hemorrhage before he can reveal that evidence...

Guest CastEdit