10 Most Messed Up Deaths In Star Trek: Deep Space Nine

10. Vargas - The Siege Of AR-558

Vargas was stationed on AR-558, tasked with holding the defences in place as Starfleet tried to crack an important Dominion communications relay. What should have been a relatively short, albeit certainly bleak, posting became hell. Vargas, along with the rest of his squad, were stuck in place for months.

They fended off repeated attacks from Jem'hadar columns, while also battling the constant fear of the Houdinis - deadly mines that popped up from subspace with no warning. 

The arrival of Captain Sisko and several of the Defiant's crew did little to raise Vargas's spirits, so thoroughly downtrodden as they were. The trauma that he carried was enough for a small army to deal with, while he shouldered it all. Then, in the final days of his posting (though he wasn't to know that) another assault by Jem'hadar soldiers saw the man brutally stabbed in the back, killing him before he could have any hope of rescue. 

This, truly, was one of the most messed up deaths in Star Trek - just how cruel did the writers need to be? Thus is the hell of war, depicted so perfectly in The Siege Of AR-558.