In the season 8 finale, the two announced at a Reagan family dinner their plans to marry.
The scene was shocking, then heartwarming and also left viewers wondering,What is going to happen next?
Indeed, that was on executive producer Kevin Wades mind when he mapped out the new season.

Credit: John Paul Filo/CBS
Adds Ray: Like anybody in a relationship, you think, Nothings going to change, right?
Theyve been together all these years, they know each other inside and out….
But what theyre constantly coming up against is Man, it has changed.
Wade doesnt mince words about the impact on one ofBlue Bloods most sacred traditions.
Its an injection of nitrous oxide into that dinner table, he teases with glee.
It throws off the balance in a good way.
Ray, meanwhile, is excited about bringing some comic relief to the proceedings.
[Eddie] is very unaware of the fact that shes comical, says the actress.
(Expect her toraveabout the peas.)
It feels like Im on a new show, she gushes.
Before, it was like, Will and I against the world.
Now its this huge collaborative effort.
Blue Bloodsreturns for season 9 on Friday, Sept. 28, at 10 p.m.
Check out an exclusive first-look photo above.