Re: There is plenty of original material
"There is plenty of original material for Sci Fi.
You can spend the next 100 years doing series with weekly episodes based just on Neil Asher's Polity universe or David Brin's Uplift universe."
Or classics as well as modern -
Hal Clement, Mission of Gravity
Arthur C Clarke, Childhood's End
Robert Heinlein, Starship Troopers (really based on the book, this time)
Keith Laumer, any of the Retief stories
Phillip K Dick, The Unteleported Man
Joe Haldeman, The Forever War
Greg Bear, The Forge of God
Patrick Tilley, Fade Out
James H Schmitz, The Demon Breed
Clifford Simak, The Big Front Yard
Frank Herbert, The Dragon in the Sea (British: Under Pressure)
Larry Niven, Jerry Pournelle, Footfall
.... and so on ...