Warning: This story contains major spoilers from Mondays episode ofSupergirl.
Read at your own risk!
The alien cat is out of the bag.

Credit: Sonja Flemming/CBS
Ultimately, Kara confronted Alex (Chyler Leigh) over the death of Astra (Laura Benanti).
It will jeopardize his relationship with the DEO, executive producer Greg Berlanti tells EW.
The interesting question is: Will he be a better hero after this?
Forcing Hank out of the proverbial closet will cause Kara to suffer a deep regret over what she did.
Its not fair to do that for someone else.
He has this duty to save these girls, EP Ali Adler says.
He made that promise to their father many years ago.
He takes that very seriously, enough to jeopardize his own safety as the head of the DEO.
Next weeks episode, well learn the etymology of that story.
He becomes the hunted, Harewood says.
The episode after this, hes uncomfortable because somebody has worked out a way to stop him shapeshifting.
Fortunately for the Martian Manhunter, hes got the Girl of Steel on his side.
She comes to rescue him, and thank goodness for that, Harewood teases.
Shes not the only one who rescues me.
The finale is great.
Supergirlairs Mondays at 8 p.m.