Sophia Bush Leaves Chicago P.D.: An Homage to Erin Lindsay's Badassery

When news broke that Sophia Bush was leaving Chicago P.D. after four seasons, we'll admit it — we were sad. But then we thought, what would Erin Lindsay do? Bush's character is a badass; she wouldn't sit around weeping over someone landing a big gig with the FBI in New York. She'd celebrate. So that's what we're going to do right here.

We're going to shine a light on her badassery, if you will.

Don't even think about calling Erin "a female cop" — she's so tough, she's a straight-up cop. Also, she'd probably do this to you if you dared consider her anything less than an equal to her male colleagues.

Erin's mentor and father-figure, Sgt. Hank Voight (Jason Beghe), is going to have a rough go of moving on past her departure. The gruff leader frequently tows the line between right and illegal — and it's often Erin who risks saying the wrong thing to keep him on the straight and narrow. The relationship was mutual: He took her under his wing when she was a drug-addicted teen.

Erin followed in Voight's footsteps when she took in addict Nadia (Stella Maeve) and helped her turn her life around. Her devotion to Nadia continued even after the character's devastating death toward the end of season 2.

Over the course of four seasons, we've seen Kim Burgess (Marina Squerciati) blossom into a pretty badass cop of her own, in no small part due to Erin's influence.

They may have been in love pretty much the entire four seasons, but it was through Erin's passion for her job that she and her partner, Halstead (Jesse Lee Soffer), were able to keep working together regardless of their relationship status.

And, of course, she saved him on more than one occassion.

It takes a strong woman to keep a mother (in this case, played by Markie Post) in her life — while always trying to save her! — even after she tells lie after lie and all but abandoned you as a child.

Erin managed to survive demons both literal and figurative throughout the seasons...

Standing up for her Chicago neighbors...

And protecting them in any way she could.

The team won't be the same without her... but we'll help them through it by watching Chicago P.D. when it returns to NBC in the fall.