This can be viewed as a standalone episode as the alien bio-weapon is dealt with by the time it is finished. However there are hints at ongoing plots that may or may not become important later on... it is so long since I first watched the series that I can't recall. There is the secret bio-weapons company that funded Hendricks's explorations and later demanded the items be handed over and there is talk of people on Earth who want nothing to do with alien civilisation.
The main story is decent enough even though the fact that we see Drake commit murder tells us something shady is going on a little too soon. The presence of David McCallum, at the time best known for his work in 'The Man from UNCLE' but now known as 'Ducky' from 'NCIS', adds a touch of class to proceedings as Dr Hendricks. The way the alien device takes over Drake is entertaining and it is certainly a formidably threat even if its ultimate defeat is a little cliché. The secondary story involving the reporter felt a little tacked on and didn't add much to the story. Overall a decent enough episode.