Best musical score/soundtrack on a TV show?
Tie: Dexter/Hannibal
You misspelled True Blood/WKRP in Cincinnati.
With bonus points to True Blood for having the most perfect opening credit sequence ever.
Honorable mention to Dear White People for consistently awesome music.
 Unfoldingchaos
                                                
                                                Level 5
                                                May 18, 2018
                                            
                                                
                                                    Unfoldingchaos
                                                
                                                Level 5
                                                May 18, 2018                                            
                                        Kicking it Old School Style:
 seaspot_run
                                                
                                                Level 7
                                                May 17, 2018
                                            
                                                
                                                    seaspot_run
                                                
                                                Level 7
                                                May 17, 2018                                            
                                        And how could I forget this?
I enjoyed the live performances on HBO's Treme. Also, I don't know when the trend started (The Sopranos?), but I like how series use different songs that play over closing credits on weekly episodes. Does that only happen on cable shows? Haven't watched a network show in ages. I've gotten in the habit of having my Shazzam app at the ready to learn what I'm hearing if it strikes my fancy.
 HikingMusician
                                                
                                                Level 5
                                                May 17, 2018
                                            
                                                
                                                    HikingMusician
                                                
                                                Level 5
                                                May 17, 2018                                            
                                        The Americans
Hawaii Five O(original)
Big Love
 sassygirl3869
                                                
                                                Level 9
                                                May 17, 2018
                                            
                                                
                                                    sassygirl3869
                                                
                                                Level 9
                                                May 17, 2018                                            
                                        I always liked the music used in Sopranos and their "theme" song is still part of my play list......
 Suffolkian
                                                
                                                Level 5
                                                May 17, 2018
                                            
                                                
                                                    Suffolkian
                                                
                                                Level 5
                                                May 17, 2018                                            
                                        Many greats mentioned. I'll add a few that i like.
 vsh76
                                                
                                                Level 5
                                                May 17, 2018
                                            
                                                
                                                    vsh76
                                                
                                                Level 5
                                                May 17, 2018                                            
                                        Love these! True Blood was great for the first season. Then it got worse and worse and omg I can't believe I'm still watching this shit but it's like a train wreck and I can't look away!!
@Remi Agreed. (I personally noped out when the witches got on and it was like a menopausal version of The Craft.) But the question was about soundtracks, not the actual show...
Uh....... How about Mr. Roger's Neighborhood.
 AmelieMatisse
                                                
                                                Level 8
                                                May 17, 2018
                                            
                                                
                                                    AmelieMatisse
                                                
                                                Level 8
                                                May 17, 2018                                            
                                        It has to be Black Beauty from the 70s or 80s. The accompanying imagery is beautiful too. Unfortunately the show itself was mind numbingly boring garbage.
 Ellatynemouth
                                                
                                                Level 8
                                                May 17, 2018
                                            
                                                
                                                    Ellatynemouth
                                                
                                                Level 8
                                                May 17, 2018                                            
                                        I love the CSI use of the Who but my mind goes back to the 70`s and this very simple moody sequence. The show was called Callan. Edward Woodward played the lead and he was very much the same character he played in the Equalizer. Younger and much more cynical working for MI5 as a hitman.
 273kelvin
                                                
                                                Level 8
                                                May 17, 2018
                                            
                                                
                                                    273kelvin
                                                
                                                Level 8
                                                May 17, 2018                                            
                                        I give big props to Fox's Peter Pan & the Pirates, for a low budget morning cartoon it had a score that would've suited Erroll Flynn's best performance.
 Rufus_Maximus
                                                
                                                Level 7
                                                May 17, 2018
                                            
                                                
                                                    Rufus_Maximus
                                                
                                                Level 7
                                                May 17, 2018                                            
                                        Doctor Who. The new series, that is.
 memorylikeasieve
                                                
                                                Level 7
                                                May 17, 2018
                                            
                                                
                                                    memorylikeasieve
                                                
                                                Level 7
                                                May 17, 2018                                            
                                        I like the Tom Baker Dr. Who.
Im old enough to remember the original 60s series. That soundtrack was phenomenal especially as it was pre-Moog synthesizer or any of our electronic gadgets, just tape machines.   
As far as far as that goes, plug in any 60's Irwin Allen show score.