Fox made #SaveLucifer the top trending topic on Twitter with its decision to cancel the Tom Ellis-starring series after three seasons and made more headlines yesterday with the dramatic last-minute renewal of another Warner Bros. TV-produced series, Lethal Weapon, with Seann William Scott replacing original co-lead Clayne Crawford.

Cancelling Lucifer was “a ratings-based decision; we had very a successful late year with all four new dramas renewed,” Fox chairman Gary Newman said during Fox’s upfront press call today. “We felt like performance-wise, we needed to make that change.”

Fox

On Crawford’s ouster and bringing back Lethal Weapon with a new co-star, Scott, playing a new character (believed to be Rggs’ brother), Fox chairman Dana Walden said, “It wasn’t our choice. Our partners at Warner Bros. came to us and said that they could not deliver the show as it was.”

She noted that it was a difficult decision on both the part of the studio and the network. After the studio presented Fox with Scott as a replacement, the network signed off on a third season.

“I think we made the right choice,” she said, noting that Scott’s addition brings “good new dynamic to the show with a lot of its original dynamic intact.”

Newman added that “90 percent of the cast is coming back,” including the Murtaugh family, which is an important focal point of the show.

“We will be making sure to let the audience know there is something new” on the series this fall, he added regarding Fox’s marketing plans for Season 3 and noted that another cop drama, ABC’s NYPD Blue, had to replace one of its two leads in Season 2 after David Caruso’s exit, but went on to have a long and successful run.