Future Klingon warship
Star Trek: The Next Generation
Episode: TNG 278 - All Good Things... Part II
Future Klingon warship
In an alternate timeline, influenced by Q and created via a temporal anomaly, this future design of Klingon vessel attacked the U.S.S. Pasteur after that ship entered the Neutral Zone.
The future Enterprise-D came to the Pasteur's aid, quickly dispensing with the Klingon threat.

