Q is a fictional character who appears in the television series Star Trek: The Next Generation, Star Trek: Deep Space Nine and Star Trek: Voyager, as well as in related products. In all of these programs, he is played by John de Lancie.
Q has nearly omnipotent powers, and is continually evasive regarding his motivations. His home, the Q Continuum, is accessible only on the rare occasions permitted, and the true nature of it is said to be beyond the comprehension of "lesser beings" such as humans.
Beginning with the pilot episode of Star Trek: The Next Generation, Q became a recurring character, with pronounced comedic and dramatic chemistry between himself and Captain Jean-Luc Picard. Gene Roddenberry chose the letter "Q" in honor of his friend, Janet Quarton. Unusually, the name "Q" also applies to all other individuals of the Q Continuum as well.