Different World bid farewell in 1993. That year, Seinfeld, which initially struggled from its debut in 1989 as a summer series, was moved from Wednesdays to Thursdays to join Wings and Cheers, with the latter series ending in May after 11 seasons, with its series finale being the second-highest-rated series finale of all-time behind the series finale of M*A*S*H and the highest-rated episode of the 1992–93 season in the US. Must See TV The "Must See" slogan was created by Dan Holm, an NBC promotional producer, during a network promo brainstorming session in June 1993 at NBC's West Coast headquarters in Burbank, California. "Must See TV" made its first appearance in NBC promotions in August 1993 and included the day of the week: "Must See TV Thursday". In late summer of 1993, NBC wanted viewers to tune in an hour prior to Seinfeld, and created the "Must See TV" slogan to brand the comedy block. The first "Must See TV" block promo aired during late summer repeats and promoted Mad About You, Wings, Seinfeld and the then-recently-concluded Cheers, which also previewed the fall premiere of its spin-off, Frasier. The advertisement ended with the sentence "Get home early for Must See TV Thursday." The "Must See TV" slogan continued in every NBC Thursday night comedy promo throughout the 1993-94 television season to promote the 8–10 p.m. comedy block. The next season, Frasier and Wings were moved to Tuesday nights, with NBC expanding the "Must See TV" brand to include the Tuesday night comedy block: "Must See TV Tuesday". Meanwhile, the flagship Thursday block acquired two new hits, Friends - which became television's second biggest comedy behind only Seinfeld - and ER, which became the number one drama on television. Seinfeld and ER would end up battling the following four seasons for the honor of number one show, before Seinfeld ended its run in 1998. On November 3, 1994, NBC's Thursday night lineup featured the "Blackout Thursday" programming stunt, in which three of the four sitcoms on that night's "Must See TV" schedule incorporated a storyline involving a power outage in New York City. The stunt started with Mad About You episode "Pandora's Box", in which Jamie Buchman (Helen Hunt) accidentally causes the blackout while trying to steal cable; it continued with the Friends episode "The One with the Blackout", featuring a sub-plot in which Chandler Bing (Matthew Perry) is trapped in