Law & Order: Criminal Intent S06E19 - Rocket Man

Commander Luke Nelson and Lieutenant Jessica Hart are in New York City to promote an upcoming shuttle launch, when Hart winds up murdered in their hotel. Detectives Goren and Eames question an ex-boyfriend and jealous colleagues of Hart, who was set to be the youngest astronaut ever to go up in space. When Detectives learn that the married Commander Nelson was having an affair with Lieutenant Hart, they realize many people were involved in covering up the dirty secret.