This Aaron Spelling drama series never reached the heights of Charlie's Angels (1976) or The Love Boat (1977), but it had it's admirers. Robert Urich plays detective Dan Tanna, a tough, determined gumshoe with a heart as soft as a pillow. He wheeled around the gambling city in a '57 T-bird and protected his clients from the more mercenary elements in town. Look for Greg Morris of Mission Impossible (1966) as the cop with a chip on his shoulder.
This series has made its way to DVD, and can be found pretty easily. Above is a network promo for the show, uploaded to YouTube by robatsea2009.
Obscurity factor: 4 (on DVD, still somewhat remembered, but unknown by many)