You call this a TV series, but you could mean a TV movie miniseries of a Stephen King novel Tommyknockers. It starred Jimmy Smits of NYPD Blue fame (and LA Law) and Marg Helgenberger, then just off the TV series China Beach, and lately from CSI.
Here's the description from IMDB:
A buried UFO slowly turns local inhabitants into gizmo-building alien mutates [sic]. (mutants is correct)
It also starred Traci Lords who I submitted in this earlier movies.stackexchange question Adult to Non-Adult movies full time.
Interesting IMDB movie citations:
Marg Helgenberger's mother, Kay, appeared in the movie (her only IMDB acting credit), as did Alan Rosenberg, Marg's then-husband; they divorced in 2010. A real family affair.