4-09: Our Man Bashir
A transporter mishap converts several crewmembers into spy-themed holosuite characters, with their true memories erased and their lives linked directly to the program.
4-18: Hard Time
Miles struggles re-adjusting to normal life after having the realistic memories of serving a long, difficult prison sentence transplanted into his mind.
4-07: Little Green Men
Quark, Rom, and Nog accidentally transport themselves back to the Roswell Incident on Earth in 1947.
4-13: Return To Grace
Kira assists Gul Dukat, now in command of a freighter, to stop a Klingon Bird-of-Prey that destroyed an outpost with a joint Bajoran and Cardassian delegation.