When a Chief Petty Officer with top-secret clearance to a Naval research laboratory is murdered, the investigation leads the NCIS team to an international arms dealer. Meanwhile, a probationary agent tries to impress Gibbs hoping to join his team.

After renting Halloween costumes from an unusual shop, Buffy and her friends literally begin turning into whatever costume they are wearing.

Voyager is sucked into an inescapable subspace void which is inhabited only by other trapped vessels battling each other for survival.

Giles' past comes back to haunt him when a demon he and Ethan Rayne summoned in their wild days comes looking for them in Sunnydale.

Sunnydale's adult population begins acting like immature teenagers after eating candy bars being sold to finance new high school band uniforms.

Feeling suddenly old and useless, Giles drowns his sorrows at a pub with old friend and sorcerer Ethan Rayne and winds up with much more than just a simple hangover the next morning.

Babylon 5 gets a new leader: Captain John Sheridan (Bruce Boxleitner - "Scarecrow and Mrs. King"). Ambassador Delenn continues her transformation. Garibaldi remains in critical condition.

Sheridan uses a powerful new tool against the Shadows. Franklin undertakes a strange mission.

Sheridan is captured and experimented upon by aliens. Delenn is removed from the Grey Council. Sheridan receives unsettling information from his superiors.

When Jessica (Angela Lansbury) is called to London to rewrite the stage adaptation of her novel, she must prove her actress friend (Jean Marsh) innocent of killing a producer. With Anne Meara.

Sydney and Vaughn risk their lives trying to find out the truth about Vaughn's father. Finally, we find out why Jack and Sloane seem to be conspiring together against Sydney and Vaughn.

A famous international assassin is hired by an imprisoned drug-lord to kill a Mexican presidential candidate, and Walker and Trivette are assigned to protect him during a campaign visit to Texas.

Londo discovers that the Drakhs are really behind the war, planning to alienate the Centauris from the alliance. He also learns his fate. Sheridan searches for Delenn's lost ship.

A famous international assassin is hired by an imprisoned drug-lord to kill a Mexican presidential candidate, and Walker and Trivette are assigned to protect him during a campaign visit to Texas.

Nash and Joe find themselves having to solve a murder while fending off a trio of hit-men.

Loose lips cause problems when the Bellamys' footman, Edward, gossips at a pub. His drunken talk of hanky-panky at a house party makes him a key witness in a messy divorce.