It's back... King William IV!

[hobbitomm]

What links…..?

1) Christopher Reeve, Stalin, David McCallum
2) Clark Savage Jr MD, Roger Bacon, Homer’s sky
3) The US’ first manned space project, The third movement of the Planets
4) The Paradoxes of Defence, an Orienteering tool
5) Cyprus and a Policeman?
6) A Navigation aid, a form of display and a Heavy (?metal?) balloon?
7) 5c and the base of a policeman?
8) A treatment for Rheumatism with the ultimate Olympian accolade?
9) An unelected leader of a minor state and a can of food.
10) Oberon’s Queen, and the giant enemies of Zeus?

And what connects them all?