We've known for ages that Century 21 was also the tag-line of the 1962 Worlds Fair in Seattle. The Space Needle really did look like something out of the Anderson Universe and has always reminded me of the Car Vu design from Captain Scarlet 1967 pilot episode, pictured below, by Mike Trim. The Space Needle is the one on the right [but which is taller?]
So I was amused earlier when I saw that the Fair also had its own theme song called Rhapsody 21. Are we sure that Captain Scarlet didn't have a hand in this event?!?
Out of interest, did Rhapsody ever have her own song or music in Captain Scarlet?