Yep, I just saw the “Dum-da-Dum” and I knew.
Star Trek - TOS
Hawaii Five-O
George of the Jungle
Happy Days
Making Our Dreams Come True (Laverne and Shirley)
Welcome Back, Kotter
Sanford and Son
Charlie’s Angels
SWAT
The Rockford Files
Dukes of Hazzard
Yakity Sax (Benny Hill)
Hill Street blues
Magnum P.I.
A-Team
Miami Vice
Simpsons
South Park
King of the Hill
Sopranos
Futurama
Monk (It’s A Jungle)
You can tell I like TV themes, can’t you? 
I have these and many others in a playlist on my MP3 player.
MASH
Anyone remember at the beginning of the series the piccolo played so flat the noise would make you grind your teeth?
Twin Peaks
Doctor Who
Monty Python’s Flying Circus (Nobody even thinks anymore “That’s a John Phillips Sousa compostion.” They think - Monty Python theme.)
the Simpsons
“An intellectual snob is someone who can listen to the William Tell Overture and not think of The Lone Ranger.”
Okay, what do I win? 
Bewitched
I Dream of Jeanie
Welcome Back, Kotter
Taxi
The Bob Newhart Show
Mary Tyler Moore
Andy Griffith Show
It’s like you typed the exact words that formed inside my head when I read the OP. Even with the added emphasis on BTTF.
Beverly Hillbillies
The Monkees
My favorite Underdog
The Good, The Bad and the Ugly
If it was left up to me the only theme song for any movie or tv show would be this.
The murder music from PSYCHO
I think everyone recognizes the theme from Mission: Impossible immediately.
The Avengers
Ride of the Valkyries----Apocalypse Now(Air Cavalry Assault)
BOM BOM BOM BOMB !--------The Longest Day
More familiarly known as “Kill the wabbit! Kill the wabbit!”
Personally:
The Animated Batman theme
Quantum Leap
The Original Star Trek
And a couple of anime ones:
Hellsing
the main theme for Nausicaa of the Valley of the Wind
Get Smart
Lost in Space
The Courtship of Eddie’s Father (“People let me tell you 'bout my best friend…”)
The Brady Bunch (the original earworm)
All in the Family (“Oh the way Glenn Miller played, songs that made the Hit Parade…”)
Taxi
Hill Street Blues
Gone With the Wind (Tara’s Theme)
On late 1960’s-early '70’s Saturday morning tv:
HR Puffinstuff (“who’s your friend when things get rough?” You can’t do a little 'cause you can’t do enough.")
The Banana Splits (“one banana, two bananas, three bananas, four. Four bananas make a bunch and so do many more!”)
Sp many earworms, so little time.
Love, Phil
By the way, you can listen to almost all of these here.
An obscure television show from the 1959-1960 season, Mr. Lucky, was blessed with one of Henry Mancini’s best themes. It’s been tied in the number one position for forty-nine years now. (Mancini also counted Peter Gunn and The Pink Panther among his successes.)
The ring tone on my phone are the five notes from the theme that came from Mr. Lucky’s pocket watch. How’s that for devotion?
(The television show was based on the Cary Grant movie from several years earlier.)
Lust4Life, we are needed…