Recap / Star Trek: Deep Space Nine S04E12 "Paradise Lost"
As Starfleet enforces sweeping security reforms on Earth, Sisko investigates the threat of Changelings and the Dominion. But mounting evidence indicates the entire situation could be an inside job.
Bavarian Fire Drill: Sisko hauls in a Red Squad cadet for a chewing out, making the cadet believe Sisko's in league with Leyton. Sisko then demands the cadet walk him through the plan to sabotage the planetary power grid to explain their "damn sloppy work".
False Flag Operation: Leyton has Red Squad disable Earth's entire power grid, then blames it on Changeling infiltrators.
Frame-Up: Leyton fakes a blood screening to make Sisko look like a Changeling infiltrator, thus getting him out of the way.
Graceful Loser: Once it's clear Leyton cannot win, he quietly takes off his rank insignia in resignation.
Insignia Rip-Off Ritual: Sisko pulls off Leyton's combadge when demanding his resignation. Leyton then takes off his admiral bars when admitting defeat.