10 Best Foreshadowing Moments In Star Trek

5. Only Human, After All

"I can't try to save humanity without holding on to what makes me human," Captain Archer tells T'Pol at the end of Impulse. Like those zombie Vulcans in all of our nightmares, that phrase would come back to haunt him. He would later forfeit the sentiment entirely.

Several episodes later, in Damage, it is T'Pol, visibly affected by her addiction to trellium-d who then reminds Archer of his adage. In need of a warp coil, Archer and the crew of the NX-01 must ignore it. By attacking and boarding the Illyrian ship, they become the marauders they had met in the beginning, as T'Pol also points out. However you feel about it, the fall for Archer was at least well-telegraphed.

A century or so later, the Illyrians didn't seem to hold the incident against Starfleet either (that we know), though they had every right to. Enterprise had left one of their ships stranded in the Expanse. For that crew, ad astra per aspera was never more prescient.