Lewis - Main Theme by Barrington Pheloung and the London Metropolitan Orchestra
There are many videos online where one can learn about the Inspector Gadget theme. YouTube has several videos and there is also a video on Vimeo where a person can learn about the Inspector Gadget theme.
The instrument used in the Doctor Who theme tune is the theremin.
Organ
It was used as the theme song on The Jerry Lewis Show from 1967-69.
If its the theme song, it was Leona Lewis
The main instrument used in the Superman theme song is the trumpet, which plays the iconic fanfare that we associate with the superhero. Additionally, there are other brass instruments and strings that contribute to the powerful and heroic sound of the theme.
M-o-r-s-e
guitar?
piano and vocal
The answer is simple- "Synthesizer"
or trumpet...or in any Bb instrument