The creator of 1950s drama The Hour had the last laugh after winning an Emmy for the critically acclaimed show which was axed by the BBC after two series.
Abi Morgan, whose other work includes the screenplay for Margaret Thatcher biopic The Iron Lady, won the award for writing in a mini-series or movie.
The programme, set in the early days of television news and starring Dominic West and Ben Whishaw, was dropped this year after ratings fell by more than a quarter in its second series.
There was disappointment for much of the British talent that gathered for the 65th annual awards in Los Angeles, with favourites including Downton Abbey actors Hugh Bonneville, Dame Maggie Smith and Michelle Dockery and Homeland lead Damian Lewis all losing out on the big gongs of the night.
It was a disappointing night for Downton, which missed out on a series of awards despite being nominated in 11 categories and enjoying big success in previous years. It took home just one award for outstanding music composition.
It was beaten to the award for best drama series by American show Breaking Bad.
Bonneville, one of the costume drama's stars, had tipped Breaking Bad's Bryan Cranston for the best lead actor gong but in the end the pair both lost out to Jeff Daniels for his performance in The Newsroom.
Other winners included Claire Danes, named best actress in a drama series for Homeland, and David Fincher, who picked up the prize for directing in a drama series for the Netflix remake of House Of Cards.
Jim Parsons was named best actor in a comedy series for his role as nerdy scientist Sheldon Cooper in The Big Bang Theory.
The flamboyant pianist was also remembered at the event with a tribute performance by Sir Elton John.