and “Chicago Fire” are the perfect viewing trilogy.

Even the actors love it when their respective shows join forces.

“It’s a lot of fun,” former “Chicago P.D.”

Chicago PD, Chicago Med, Chicago Fire cast members

star Sophia Bush toldTV Tango.

“It’s one big fraternity house.

It’s like your friends are coming over for a play date.

Monica Raymund and Nick Gelfhuss

We goof around a lot.

And we take it seriously when we have to.

But it’s really just exciting.”

Jesse Lee Soffer, Taylor Kinney & S. Epatha Merkerson

Unfortunately, the pandemic has put a pin in any future crossover events.

“But the Delta variant kind of forced our hand.”

In the meantime, though, these four crossover events can still be enjoyed in reruns.

Nick Gehlfuss & Jesse Lee Soffer

Firehouse 51 rescues victims of an industrial chemical leak, bringing them to Chicago Memorial.

“That’s where our show is good, because we’re concentrating on the characters.

They don’t see themselves as heroes.

Christian Stolte & Amy Morton

Chicago P.D.

joined in on the action in 2016

Chicago P.D.

’s episode “Now I’m God,” perSpoilerTV.

He knows she’s watching in a way.

showrunner Matt Olmstead toldThe Hollywood Reporter.

“He’s restrained because he wants to do it the right way.”

While driving home from dinner one night, they came upon an overturned car in a ditch.

When she saw Soffer, she screamed in shock.

Infection focused on a deadly bacteria spreading throughout the city.

It seemed like a leaping off point for three exciting hours.”