It has been 50 years since the first episode of Star Trek was broadcast, bringing Mr Spock, Captain Kirk and Lieutenant Nyota Uhura to our TV screens.
Naturally, Trekkies are excited.
Fans paid tribute to the timeless TV show on its birthday.
-- janet france (@janetfrance) September 8, 2016
@StarTrek Happy birthday to the World's best looking 50-year old!
-- Tobias Sonestedt (@Flamingolane) September 8, 2016
Happy early birthday to one of the best sci-fi shows ever. Love you so much Star Trek. Happy 50th ???? pic.twitter.com/Kx6GLgXHj3
-- Jere?& (@jerelyn94) September 8, 2016
One fan yearned for her own moment of tenderness like Captain Kirk and Mr Spock.
-- Amanda (@Pandamoanimum) September 8, 2016
People paid tribute to the show, which featured a diverse cast and the first inter-racial kiss between a white man (Kirk) and a black woman (Uhura, as played by Nichelle Nichols) on television.
-- paul quigley (@QUIGGYPAULS) September 8, 2016
showed us that sometimes the best thing you can do for the worst parts of society is to let them self-destruct. History always marches on.
-- Last Ming Standing (@NateMing) September 8, 2016
And when Star Trek asked for selfies to celebrate the birthday...
-- Star Trek (@StarTrek) September 7, 2016
Fans happily obliged.
-- cafedunoir (@cafedunoir) September 7, 2016
-- Mandy LLAP (@AmandaThelwell) September 7, 2016
-- t'luaranoko D'vinn (@COP_Frostfox) September 7, 2016
The most appropriate way to celebrate the show's half-centennial? Watch it all over again!