Special

A special, in terms of communications, is a part of a program or publication that is not part of a regular schedule, but is created to generate interest from media consumers.

In the television broadcasts of the planet Magna Roma, regular series of gladiator-style fights were part of the normal schedule. However, a particularly notable event, sometimes a brutal spectacle or execution, would be shown as a special. Prisoners, an USS Enterprise landing party among them, were reticent to fight one another in the year 2267, leading the head Magna Roman guard to threaten them. If they failed to provide a decent spectacle for the cameras, he promised to do a special on them. 

Background
In comic book publishing, special issues have been released for many series of Star Trek books:
 * DC Comics
 * Star Trek: The Original Series (DC first series):
 * #33: "Vicious Circle!" (20th anniversary)
 * Star Trek: The Original Series (DC second series):
 * Star Trek Special, Issue 1
 * Star Trek Special, Issue 2
 * Star Trek Special, Issue 3
 * WildStorm Comics:
 * Star Trek: The Next Generation (DC second series):
 * Star Trek: The Next Generation Special, Issue 1
 * Star Trek: The Next Generation Special, Issue 2
 * Star Trek: The Next Generation Special, Issue 3
 * Star Trek: The Next Generation (Marvel):
 * Riker Special #1: "The Enemy of My Enemy"
 * Star Trek: Deep Space Nine (Malibu)
 * Worf Special #1
 * Worf Special #1