How Gabby could return is a question, as there are ways for her to come back.

A full-time return to the show may be unlikely as Gabby has moved on with her

life and seems happy handling her charity work abroad. Having her jump right

back into firefighting/paramedic work in Chicago seems too much of a step back rather than her character evolving. At least returning for a few episodes could be good to bring back her fun spirit.

Casey no longer being around may be a good thing for Dawson as it avoids an awkward reunion. A great idea would be Dawson dropping in to help with Stella’s Girls on Fire program as her own journey to become a firefighter would be an inspirational story to others. It’d also be nice to see her and Stella together again. Dawson could even give Novak some advice on how to temper herself, speaking from her own experiences on how being a maverick can come back to bite you.

It’d also be good to know if Dawson has moved on with a new romance and maybe even adopted a child to finally be a mom. The show is great at bringing back some past characters, and Dawson returning would make sense. She won’t be the new chief or even sticking around Chicago long yet, so an episode or two to catch up on her fits well.

It’s up in the air if Raymund would be open to coming back, although now that her schedule is free with Hightown ending, she can be swayed. With so many changes hitting Chicago Fire in cast comings and goings, bringing back one of their original stars would placate fans and spark up a show that is entering a 13th season.