They were both: series and movies. And I liked best the part where they came to earth. They had cool flying moterbikes and an invisibility device for their ship. They parked it in a public park and then some softball-players were mighty puzzled when their balls bouced of of thin air!
The Movie (IMDB)
The series
Edit:
I'm curious as to the quality of the new series... StarBuck will always be Face (from the A-Team) for me
He also plays this role in the new series :w00t:
Also cool was Buck Rogers in the 25th Century. Bidi-bidi