Mrs debbie daniels
What was the name of the TV show about an alien living in Denver Colorado?

The show is Mork and Mindy, starring Robin Williams as Mork.

And may I add it was set in Bolder, Co.

Mork and Mindy.

http://www.sitcomsonline.com/morkandmindy.html

tells you all you need to know. In it's time it was brilliant - must see TV, in the same way the Happy Days was.