Star Trek: The Next Generation - Season 2 Episode 8 -

When the Federation promotes an officer exchange program, Commander Riker decides to accept an assignment aboard a Klingon war ship. As the first Federation officer to serve aboard a Klingon vessel, Riker has to gain the trust of his new shipmates and particularly that of his irascible captain. As part of the same exchange program, the Enterprise welcomes aboard Ensign Mendon from a culture that is forever seeking to improve operational efficiency. When he discovers a bacteria attacking the integrity of the ship's hull, he searches for a solution on his own rather ...