The D4 class was a type of small Klingon patrol ship used by the Klingon Empire in the alternate reality in the mid 23rd century.

The D4 class was armed with two directed energy cannons on top of the wings near the fuselage. The homing green energy blasts from the cannons could arc through the air before impacting a target. The engine had a single aft exhaust. The wings could be angled in various ways, giving the ship high-speed atmospheric maneuvering capabilities and allowing it to maneuver through tight spaces. The ship had landing capabilities. Troops from the ship could also be deployed on cables mid-flight from four hatches in the underside of the craft.

In 2259, three of these vessels intercepted the K'normian trading ship that was confiscated by the crew of the USS Enterprise during the Mudd Incident. The trade ship was carrying James T. Kirk, Spock, Nyota Uhura, Hendorff and another security officer over the Ketha Province on Qo'noS. The D4 class ships forced the trade ship to land. Two of the ships were destroyed by Khan Noonien Singh with a boolean gun. Sold Out!

Dimensions:
Length: 8-inches

Release Date: July 2015

Historical Account: "The Klingons" - are a fictional extraterrestrial humanoid warrior species in the science fiction franchise Star Trek.

Klingons are recurring antagonists in the 1960s television series Star Trek: The Original Series, and have appeared in all five spin-off series, along with eight of the feature films. Initially intended to be antagonists for the crew of the USS Enterprise, the Klingons became a close ally of humanity and the United Federation of Planets in Star Trek: The Next Generation. In the 1990s series Star Trek: Deep Space Nine the United Federation of Planets briefly goes to war with the Klingons. Later in that series, the two join together with the Romulans to fight the Dominion.

As originally developed by screenwriter Gene L. Coon, Klingons were swarthy humanoids characterized mainly by prideful ruthlessness and brutality. Totalitarian, and with a martial society relying on slave labour, they reflected analogies with both Nazi Germany and the Soviet Union. Although Cold War tensions are apparent in the characterization, Star Trek creator Gene Roddenberry did not intend any explicit political parallels. With a greatly expanded budget for makeup and effects, the Klingons were completely redesigned in Star Trek: The Motion Picture (1979), acquiring ridged foreheads that created a continuity error not explained by Star Trek canon until 2005. In later films and in the spin-off series Star Trek: The Next Generation, the militaristic traits of the Klingons were bolstered by an increased sense of honour and strict warrior code similar to those of bushido.

Among the elements created for the revised Klingons was a complete Klingon language, developed by Marc Okrand from gibberish suggested by actor James Doohan. Spoken Klingon has entered popular culture, even to the extent that the works of William Shakespeare and parts of the Bible have been translated into it. A dictionary, a book of sayings, and a cultural guide to the language have been published. According to Guinness World Records, Klingon is the world's most popular fictional language as measured by number of speakers.