First Wave was a Canadian action/Adventure SF series that ran from 1998-2001. It ran for three seasons on the Space Channel in Canada. Yay Canada!
The plot centers around Cade Foster who’s framed for his wife’s murder and is on the run to uncover a vast alien conspiracy. From what I gathered-it took a bit to put the pieces together-the aliens kidnapped him and made him part of an experiment to test emotions or responses or something. Anyway, Foster doesn’t become their pawn and goes on the run. He is helped along by Eddie, a guy who ran a paranormal magazine and does all the computer nerd stuff. They are later joined in their quest to stop the aliens by an alien assassin turned ally named Joshua.
The aliens are called the Gua, who eventually intend to take over Earth. The Gua come from a star system via wormhole travel by putting their souls into little silver orbs and inhabiting human husk bodies. (This saves on the make-up budget, I am sure.) Also, salt is a highly addictive drug to the Gua. (If the Gua are inhabiting human bodies why would salt have adverse affects? Nevermind.) Apparently, Nostrodamus was a Gua and his predictions of three waves leading to the destruction of mankind are part of the alien plot. Most of the episodes involve Cade and Eddie following strange, paranormal stories and then investigating them for the true alien link. Every once and a while, law enforcement tracks Cade or aliens try to kill him.
The lead actor Sebastian Spence was later on Battlestar Galactica. I didn’t recognize him from that, but I realized that I did recognize him from the infamous X-files episode Home. Roger Cross, who plays the alien Joshua is apparently in Dark Matter (which I haven’t seen) but was also in the very fine Canadian SF show Continuum. And Traci Lords who was quite famous/infamous in the 1980’s for her porn career and the whole debate about it; but later became mainstream actress.
First Wave is a decent show. It’s formulaic and loses steam as the episodes go on. But it’s not a bad show and it was an interesting trip down nostalgia lane.