The Janus Incident (Star Trek)

The Constitution-class Federation starship USS Enterprise NCC-1701, commanded by Captain James T. Kirk, arrived at the Janus star system. There the Enterprise encountered a strange starship. This starship was shaped like a pyramid. The Enterprise went to Red Alert, powered up her weapons, and raised shields. The pyramid like starship opened fire on the Enterprise. A fierce battle then ensued! The Enterprise fired 6 photon torpedoes at the pyramid like starship, destroying it. The pyramid like ship turned out to be a Borg pyramid.