The episode had a good point, I've heard a few blonde jokes in my day, but it also made me realise that actually I've seen several blonde characters on TV who are were very intelligent. In fact, I've not really noticed any dumb blonde stereotypes, which hopefully means that certain negative stereotypes are becoming obsolete.
Then again, when writing this list, two of the characters that came to mind have been on previous top five lists - which means either I have to watch more TV, or there is a small pool of characters to choose from. In the end though I did manage to think of more.
Anyway, here's my list of the top five blonde characters, who definitely are not dumb. Please tell me what you think about this subject in the comments!
1] Lisa Simpson - The Simpsons
The character who inspired this list is of course blonde, not that I really registered it until now thanks to her equally yellow toned skin. Lisa is academically very intelligent, a lover of literature, art and jazz. She is a member of MENSA, and gets involved in a variety of scientific pursuits such as astronomy and meteorology, as well as artistic ones such as music. Basically an all round Renaissance woman!
2] Buffy Summers - Buffy the Vampire Slayer
3] Seven of Nine - Star Trek: Voyager
A human turned Borg, Seven of Nine is basically a genius who's Borg knowledge gives her a technological edge over her Starfleet counterparts. In fact she is so smart, she is even invited to join a group of genius aliens, a sort of think tank, in one episode. As well as her scientific expertise, she is also an accomplished pianist and singer. She also helped create and run Voyager's astrometrics lab.
4] Bernadette Wolotiz - The Big Bang Theory
5] Romana II - Doctor Who
A Timelord who joined the Doctor with the sole purpose of helping him find an ancient and dangerous device, Romana not only matched the Doctor in intelligence but hinted at having left the Timlord's Academy with better test scores - she left with a triple first! Blonde here in her second incarnation, she was also more relaxed but nonetheless still extremely clever. In one episode it turns out she has even built her own sonic screwdriver, with which she helps repair a spaceship, and which the Doctor seemingly tries to nick. In spin-off media Romana continues to do well beyond her travels with the Doctor, and becomes President of Gallifrey itself.