Star Trek: Deep Space Nine, season 6, episode 18
Inquisition
Summary
Dr Bashir is busy wrapping up unfinished tasks prior to departing DS9 to attend a medical conference. Just prior to his departure, an Internal Affairs unit under the command of an individual named Sloan, arrive and announce they will be interviewing all the senior staff. Things take a worrying turn for the good doctor when he realises that he is the subject of the investigation and Sloan accuses him of spying for the Dominion.
Summary from Wikipedia, CC BY-SA 4.0.
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