Entertainment Tonight for Tuesday, December 28, 2021

What you never knew about your favorite TV shows. From “The Morning Show” to “Ted Lasso,” ET’s spilling all the set secrets. Jennifer Aniston and Reese Witherspoon reveal what you never knew about “The Morning Show.” And is Oprah about to join them? Plus, the behind-the-scenes McDreamy drama on “Grey’s Anatomy.” Then, Rob Lowe’s set reveals before “9-1-1 Lone Star” returns. Plus, surprises from inside “NCIS: Hawaii” headquarters. And, 30 years later, Jerry Seinfeld shares what he thinks “Seinfeld” is really about.