Will Thorne Staff WriterSteve Carell is officially returning to “The Morning Show.”Apple has confirmed that he will be back for the series’ upcoming second season, reprising the role of disgraced host Mitch Kessler. The streamer has also announced two additions to the cast in “Russian Doll” alumna Greta Lee and Ruairi O’Connor, whose recent credits include “The Spanish Princess.”Jennifer Aniston, Reese Witherspoon and company will be back in production for season 2 on Oct.