edited to remove personal details
With, fabulous Roy Thinnes as "architect, David Vincent", every Saturday at midnight Eastern.
Warning-- not all of the MeTV channels are carrying this national feed-- they have the option of substituting their own alternate programming. But most are carrying it, apparently. Even if you can't get it though, I recommend the series on DVD. There are only a few seasons, so not that pricey!
"The Invaders" is so worth a look. It's the late 60's, and David Vincent is an ambitious young architect. His life is changed, and his lonely quest begins, when he accidentally discovers that aliens have quietly arrived on earth, bent on spreading their influence and eventually conquering and enslaving humanity for their purposes...
This series has all the earmarks of the other classic Quinn Martin productions ("The Fugitive", "Cannon", "Barnaby Jones", "The Streets of San Francisco".) It has a sci fi premise, true, but because of high production values, art direction, etc., and immensely engaging casts (including everyone from Ralph Bellamy to Diana Muldaur, to Jack Warden, to Diana Hyland, to Dabney Coleman, to Susan Strasberg, to Roddy McDowell, and on and on) it is a show for everyone, even those who don't like sci fi. A tiny fraction of the notables who appeared on the show--
James Whitmore:

Suzanne Pleshette:

Jack Lord:

Gene Hackman:

"The Invaders" has become a cult favorite (and French intellectuals are partly responsible for this, ha) in the years and decades since production. It's also partly due to talented Roy Thinnes. He strikes that perfect balance between "sensitive" and "hunky", and the way he plays Vincent is interesting. Apparently some producers wanted him to be less of a crusader, and more of a 'smiley' star-- but he plays Vincent as a passionate, intense, even impatient and irritable Paul Revere, trying to warn the indifferent denizens of earth about the insidious invasion.

In the second season he finally gets some support, in the form of millionaire industrialist Edgar Scoville (distinquished, silver-haired Forties' actor and heartthrob Kent Smith) and other allies. But without a doubt, charismatic Roy Thinnes carries the series.

Oh, and speaking of Jack Lord and Diana Hyland, here's one of my favorite episodes from the series. She's the pampered, alienated wife of controlling Jack Lord, who heads a company that David Vincent (Roy Thinnes) discovers may be on the verge of collaborating with the invaders. David Vincent manages to worm his way into their household employ so that he can find out more. Love the Sixties' interior sets and the kicky Sixties' wardrobe for beautiful Diana Hyland...
https://www.youtube.com/watch?time_continue=7&v=6A4T7WqD8Gw