Farscape (1999)

S1E18 A Bug's Life

As a peacekeeper ship nears Moya, Crichton and Aeryn disguise themselves as peacekeeper officers on a covert operation, while the rest of the crew is confined to cells to lend credibility to their ruse. Upon boarding, the peacekeepers bring along some mysterious cargo. However, chaos ensues when the cargo manages to break free, putting everyone on the ship in jeopardy.