Evolution (Star Trek: The Next Generation) neutronium as a result of a stellar explosion that occurs every 196 years and is due to occur in the next few hours. Stubbs plans to launch a probe, dubbed the Egg, to gather the data, a result of a lifetime's development. Meanwhile, Chief Medical Officer Dr. Crusher (Gates McFadden) has returned to her duties on the "Enterprise" after a stint at Starfleet Medical. As the expected time of the stellar explosion nears, the ship malfunctions in odd ways, and the issue is traced to the computer core. Acting Ensign Wesley Crusher (Wil Wheaton), who had been working on a
Star Trek: The Next Generation also appeared in "Star Trek VI: The Undiscovered Country". All episodes of "Star Trek: The Next Generation" were made available on VHS cassettes, starting in 1991. The entire series was gradually released on VHS over the next few years during the remainder of the show's run and after the show had ended. The VHS for TNG were available on mail-order usually two episodes per VHS cassette. Paramount published all episodes on the LaserDisc format from October 1991 using an extended release schedule that concluded in May 1999. Each disc featured two episodes with Closed Captions, Digital Audio, and CX encoding.