If you were looking forward to a new episode of "Arrow" tonight, then this news might be a bit disappointing. The hit CW series will not be airing tonight because the network switched around its broadcast schedule this week, and its latest new episode aired this past Monday night instead. The reason for this change was to accommodate the four-show crossover event, "Crisis on Earth-X," with "Supergirl," "Arrow," "The Flash" and "DC's Legends of Tomorrow." With the "Arrow" part of the crossover airing on Monday night after "Supergirl," it allowed for the event to take place over two nights instead of three, and also prevented the flow from breaking up due to the usual Wednesday block of superhero-less programming. The scheduling for "Arrow" will go back to normal next week, just in time for its Season 6 midseason finale.

Supergirl Absent for most of this season, Calista Flockhart returns, and her character's reappearance complicates the problem Supergirl (Melissa Benoist) is facing involving actions that the president (guest star Lynda Carter) wants taken against Rhea (guest star Teri Hatcher). Dancing With the Stars In this new episode of the unscripted competition, each judge gives a couple a specific challenge. Also, Cheryl Burke returns to the dance floor for a special performance, and Calum Scott performs. Gotham The secret weapon earmarked by the Court of Owls to demolish the city is found by Gordon (Ben McKenzie), while Bruce (David Mazouz) discovers something dangerous in the plan devised by Kathryn and Temple Shaman (guest stars Leslie Hendrix and Raymond J. Barry). Man With a Plan Don and Marcy's (Kevin Nealon, guest star Kali Rocha) joy over getting a visit from their new grandson leads Adam and Andi (Matt LeBlanc, Liza Snyder) to consider having another baby.

"Supergirl" stars Chyler Leigh and Floriana Lima revealed that they were pleasantly surprised by how significant Alex and Maggie's relationship has become to viewers who are struggling with their sexuality. "There was no way we would have known the impact that this would have had," Leigh told People at the 28th GLAAD Media Awards ceremony, where "Supergirl" was nominated for best dramatic TV show for its story featuring the lesbian relationship of Alex and Maggie. "We definitely wanted [Alex and Maggie's relationship] to be a strong representation, and that's why we've thought so hard about it and wanted it to be beautifully done," Leigh continued. "So I'm just really happy with the writers of'Supergirl,' who have really brought this to life." READ: Is there a James-centric "Supergirl" episode coming up? "We're just really humbled by it, very proud of it," added Lima who attended the awards night with Leigh.