Captain Walker Keel, an old friend of Picard's, uses a top-secret frequency, thus excluding informing Riker, to summon him to a top-secret meeting with two other captain. The vague innuendo about a plot to take over a strategic sector of the Federation by replacing mysteriously dying Starfleet officers doesn't quite impress Picard, but he reconsiders after Keel and his crew die in an explosion. So he intends with Riker to visit Starfleet HQ, where he will dine with admirals and their aide Dexter Remmick, while Riker keeps an eye on admiral Aaron, who insists to visit the modernized Enterprise, actually carrying an alien brain-parasite. Written by
Did You Know?
Although done in a science fiction manner, much of the story of this episode resembles a real life phenomenon called Capgras Syndrome, a disorder in which a person believes a friend, spouse, parent, other family member, or even a pet to have been "replaced" by an identical imposter (sometimes referred to as a doppelganger, a concept appearing in many myths and traditions throughout human history). Patients with the disorder sometimes believe the "doppelganger" is being controlled or is simply not the person they knew, despite all evidence to the contrary. In this episode, the explanation is parasitical aliens and Picard's fears turn out to be true; in real life the explanation is a neurological disorder seen in patients with paranoid schizophrenia, dementia, or brain injury. See more
(at around 12 mins) Cmdr. Riker issues the command to LaForge to increase to Warp 6, to which LaForge replies "Aye sir, Full Impulse." Full Impulse Drive on the Enterprise-D is equivalent to 1/4 the speed of light, while Warp 6 is roughly equivalent to somewhere between 100-200 times the speed of light (depending on warp scale used). See more
And watch your back, Picard.
Star Trek: The Next Generation Main Title
Composed by Jerry Goldsmith
and Alexander Courage See more