An old SF show that tried to mix drama with science fiction. The core idea is similar to later series that sport an alien invasion and a government conspiracy (see X-Files, Dark Skies, Threshold). While some concepts were surely groundbreaking for its time, like the attempt to include serious elements, it never really works.
There’s always a disconnect that makes you feel like watching two different shows, one is a sci-fi gadget show seemingly aimed at a younger audience and another one that has drama plots and only incidental also aliens. Add to the mix some really stupid plot decisions and plots holes concerning the bigger concept, a glacial pace and rather simple and predictable plots, and you’ll have a show that’s interesting from a historical perspective, but not very interesting to watch in itself.