Look up anyone list of best episodes for TOS, TNG, and DS9 and most of them will have "City on the Edge of Forever", "The Best of Both Worlds, and "In the Pale Moonlight" at the top. If not the top, they'll always at least be in there.
Today I was thinking about what they all have in common.
"City on the Edge of Forever": Kirk has to sacrifice Edith Keeler, who he fell in love with, to save the future and, along with it, the Federation. This sounds a lot easier than it is to do and puts Kirk through the wringer.
"The Best of Both Worlds": Picard has to stop a Borg invasion which would lead to the destruction the Federation. Picard is kidnapped and transformed into Locutus. Then, as Locutus, he helps destroy several Starfleet ships. Though not his technically not his fault fault, his actions as Locutus and the actual assimilation process itself puts Picard through the wringer.
"In the Pale Moonlight": The Federation is losing the war against the Dominion and will fall unless another allie is found to help them fight the Dominion. Desperate, Sisko takes Garak's suggestion and arranges for a criminal to forge a recording where the Dominion plan to attack Romulus. Though Starfleet approved the plan and Romulan Senator Vreenak was killed before exposing Sisko after he learned of the forgery, it put Sisko through the wringer.
All in three cases, the Captains were put into impossible situations they had to grapple with while fighting to save their society.
Today I was thinking about what they all have in common.
"City on the Edge of Forever": Kirk has to sacrifice Edith Keeler, who he fell in love with, to save the future and, along with it, the Federation. This sounds a lot easier than it is to do and puts Kirk through the wringer.
"The Best of Both Worlds": Picard has to stop a Borg invasion which would lead to the destruction the Federation. Picard is kidnapped and transformed into Locutus. Then, as Locutus, he helps destroy several Starfleet ships. Though not his technically not his fault fault, his actions as Locutus and the actual assimilation process itself puts Picard through the wringer.
"In the Pale Moonlight": The Federation is losing the war against the Dominion and will fall unless another allie is found to help them fight the Dominion. Desperate, Sisko takes Garak's suggestion and arranges for a criminal to forge a recording where the Dominion plan to attack Romulus. Though Starfleet approved the plan and Romulan Senator Vreenak was killed before exposing Sisko after he learned of the forgery, it put Sisko through the wringer.
All in three cases, the Captains were put into impossible situations they had to grapple with while fighting to save their society.