Firefly

"Five hundred years in the future, a renegade crew aboard a small, spacecraft tries to survive as they travel the unknown parts of the galaxy and evade warring factions as well as authority agents out to get them."

I am really late discovering this thrilling space western (it only ran for one series back in 2002-2003). The show ticks all the boxes for great entertainment. It is scary, exciting, sexy and full of adventure. It's easy to see why it has a such a strong cult following.