you can visit a former amusement park in the NC mountains, the Land of Oz. It’s open a couple of times a year to visit . They have a yellow brick road.
In “The Silence of the Lambs” (the book, not the movie) Clarice Starling enters a storage facility holding the possessions of one of Hannibal Lecter’s former psychiatric patients (and a certain souvenir left behind for Clarice to discover). At one spooky juncture she says to herself “Well Toto, we’re not in Kansas anymore”. :smack::eek::
In Twister, the equipment pack was named Dorothy. Plus the cow in the tornado.
In the TV series ER, Dr. Mark Greene died peacefully to Israel Kamakawiwo’Ole’s version of Somewhere Over the Rainbow.
Stargate SG1 has frequent, and I mean frequent, Wizard of Oz references.
There’s a partial list here.
That’s exactly what Picard thought in the episode. Turns out, the tornadoes were actually other Q sent to execute them. And they were living as humans at the time, so they had no opportunity to fight back.
You’re the one person I associate with having a lot of Star Trek knowledge. Do you not remember “True Q” from TNG?
I came here to say this - my favourite being Daniel Jackson stalling for time by pretending to be a Goa’uld called “the Great and Powerful Oz”. 
Nope. I missed a lot of ***TNG ***episodes when I was living abroad full time and have yet to catch up on them. Haven’t seen that many DS9 episodes either.
There was an X-Files episode–I forget which one–where Mulder comes out of a concussion and is face to face with the Lone Gunmen. He looks at one of them and says “Oh Scarecrow, I think I’ll miss you most of all!”
Gooodbye Yellow Brick Road
Scarecrow and Mrs King
WOW!
88 posts and no mention of MST3K!? I think there is an obligatory Wizard of Oz reference in almost every episode!
“Step forward cowardly lion!”
“that he didn’t already have.”
Yep, or simply referencing “the man behind the curtain” is used often.
“… And your little dog, too!” was used on Frasier, in reference to Eddie.
In the ending of the novel Hyperion, the 6 pilgrims end the novel by singing “Follow the Yellow Brick Road” and then asking themselves “who is the wizard?” and “what is Oz?”.
In an episode of MAS*H, Klinger dresses up as Dorothy, complete with a dog named Toto.
Ooh…can’t believe we haven’t yet mentioned Lost - two biggies from there are that Ben Linus originally used the alias “Henry Gale”, and the episode in which Locke meets Jacob is titled “The Man Behind the Curtain.”
That joke works better if you specify the bridge as the problem element, as “…not being able to remember how the ‘Somewhere Over the Rainbow’ bridge went…”
The 1970 Robert Altman film Brewster McCloud has lots of Wizard of Oz references, including a character dressed as Dorothy (who ends up with a dog, Toto). Margaret Hamilton, the Wicked Witch herself, was cast in the film, and is shown wearing ruby slippers. She dies in them, her ruby-slipper-clad feet stretching out like the Wicked Witch of the East’s:
https://www.google.com/search?q=Brewster+McCloud+Margaret+Hamilton&source=lnms&tbm=isch&sa=X&ved=0ahUKEwjopfmqwqLiAhWHZd8KHfNHCNAQ_AUIDigB&biw=1440&bih=708#imgrc=P9CH2uBCYjI7eM:&spf=1558094578542An excellent point, thank you! I should also mention that the saxophonist was down-and-out and had hoped to make a comeback, which is why he was so distraught. 
Another musical reference:
Captain Beefheart and his Magic Band - Yellow Brick Road
A friend’s expat father lived in the Netherlands for about twenty years. At his funeral, his many friends sang “Over The Rainbow”, in Dutch.
Dan
I just learned about another reference of Wizard of Oz I wasn’t aware of, but which makes sense: I saw a documentary about Nirvana’s last video for "Heart Shaped Box"with comments from its director Anton Corbijn, and he mentions that all the visual ideas came from Kurt Cobain himself and that “of course it was all inspired by the Wizard of Oz.”
ETA: just noticed a connection to the post above: of course Anton Corbijn is Dutch and just like the wedding company mentioned above familiar with the film.
A debatable one: Cracker’s 1993 hit song “Low” has the line “a million poppies gonna make me sleep”