I had such a great response to my post 12 TV Shows That Changed Their Themes that I’ve collected fourteen more examples of shows that scrapped one theme tune for an entirely different one.
The Bold Ones
Sheriff Lobo
Season 2
Ohara
Happy Days
Baywatch
Cagney & Lacey
OHara
I Dream of Jeannie
The Drew Carey Show
Nash Bridges
Hazel
(changed the theme twice.. in seasons 4 & 5)
The New Dick Dyke Show
Julia
The Smith Family
Babylon Five