The medical drama returned after that jaw-dropping fall finale.

Here's what we know about what's ahead so far.

It's only happened once before on the show.

Can you guess which is the most-hated episode, according to these fans?

The character, who was pregnant with twins, had a heart emergency that needed an operation in the fall finale.

The diagnosis mirrors the current story of his on-screen character.

Plus, a cancer scare puts an OG in trouble.

The apologies were a-flowing on Thursday's episode.

Find out when new seasons of 'The Rookie' and 'Will Trent' premiere, '9-1-1,' 'High Potential,' and others return, and more.

It looks like Teddy is moving on with Cass, so should Owen get together with his childhood friend now, too?