Year: 2019

CHICAGO FIRE-- "Buckle Up" Episode 804 -- Pictured: Jesse Spencer as Matthew Casey -- (Photo by: Adrian Burrows/NBC)

Chicago Fire season 8, episode 5 synopsis and promo: Buckle Up

Chicago Med season 5, episode 5 synopsis: Got A Friend In Me

One Chicago crossover leads to huge ratings for franchise

Colin Donnell is doing awesome things after leaving Chicago Med

CHICAGO P.D.- "Infection Part III" Episode 707 -- Pictured: Nick Gehlfuss as Dr. Will Halstead -- (Photo by: Matt DinersteinNBC)

One Chicago crossover: The 5 most valuable characters

CHICAGO P.D.- "Infection Part III" Episode 707 -- Pictured: (l-r) Jesse Lee Soffer as Det. Jay Halstead, Jason Beghe as Sgt. Hank Voight -- (Photo by: Matt DinersteinNBC)

Chicago PD season 7, episode 4 takeaways: Infection, Part 3

CHICAGO MED- "Infection Part II" Episode 506 -- Pictured: (l-r) Oliver Platt as Dr. Daniel Charles, S. Epatha Merkerson as Sharon Goodwin, Jason Beghe as Sgt. Hank Voight -- (Photo by: Liz SissonNBC)

Chicago Med season 5, episode 4 takeaways: Infection, Part 2

CHICAGO FIRE -- "Infection, Part I" Episode 805 -- Pictured: (l-r) Miranda Rae Mayo as Stella Kidd, Torrey DeVitto as Dr. Natalie Manning, LaRoyce Hawkins as Officer Kevin Atwater, Jesse Lee Soffer as Det. Jay Halstead, Kara Killmer as Sylvie Brett, Tracy Spiridakos as Det. Hailey Upton, Taylor Kinney as Lt. Kelly Selly Severide, Jesse Spencer as Matthew Casey, Marina Squerciati as Officer Kim Burgess -- (Photo by: Sandy Morris/NBC)

Chicago Fire season 8, episode 4 takeaways: Infection, Part 1

CHICAGO P.D.- "Infection Part III" Episode 707 -- Pictured: (l-r) Marina Squerciati as Officer Kim Burgess, Patrick John Flueger as Officer Adam Ruzek -- (Photo by: Matt DinersteinNBC)

What’s next for Burzek in Chicago PD season 7?

CHICAGO P.D.- "Infection Part III" Episode 707 -- Pictured: (l-r) LaRoyce Hawkins as Officer Kevin Atwater, Tracy Spiridakos as Det. Hailey Upton, Jesse Lee Soffer as Det. Jay Halstead -- (Photo by: Matt DinersteinNBC)

Chicago PD season 7, episode 4 recap: Infection, Part 3

CHICAGO MED- "Infection Part II" Episode 506 -- Pictured: Nick Gehlfuss as Will Halstead -- (Photo by: Liz SissonNBC)

Chicago Med season 5, episode 4 recap: Infection, Part 2

CHICAGO FIRE -- "Infection, Part I" Episode 805 -- Pictured: (l-r) Marina Squerciati as Officer Kim Burgess, Torrey DeVitto as Dr. Natalie Manning, Tracy Spiridakos as Det. Hailey Upton, Miranda Rae Mayo as Stella Kidd, Kara Killmer as Sylvie Brett, LaRoyce Hawkins as Officer Kevin Atwater -- (Photo by: Sandy Morris/NBC)

Chicago Fire season 8, episode 4 recap: Infection, Part 1

CHICAGO P.D.- "Infection Part III" Episode 707 -- Pictured: Patrick John Flueger as Officer Adam Ruzek -- (Photo by: Matt DinersteinNBC)

Chicago PD season 7, episode 4 live stream: Watch online

CHICAGO P.D.- "Infection Part III" Episode 707 -- Pictured: LaRoyce Hawkins as Officer Kevin Atwater -- (Photo by: Matt DinersteinNBC)

Chicago PD season 7, episode 4 preview: Infection, Part 3

CHICAGO MED- "Infection Part II" Episode 506 -- Pictured: Yaya DaCosta as April Sexton -- (Photo by: Liz SissonNBC)

Chicago Med season 5, episode 4 live stream: Watch online

CHICAGO MED- "Infection Part II" Episode 506 -- Pictured: (l-r) Torrey DeVitto as Dr. Natalie Manning, Tracy Spiridakos as Det. Hailey Upton -- (Photo by: Liz SissonNBC)

Chicago Med season 5, episode 4 preview: Infection, Part 2

CHICAGO FIRE -- "Infection, Part I" Episode 805 -- Pictured: Eamonn Walker as Battalion Chief Wallace Boden -- (Photo by: Matt Dinerstein/NBC)

Chicago Fire season 8, episode 4 live stream: Watch online

CHICAGO FIRE -- "Infection, Part I" Episode 805 -- Pictured: Kara Killmer as Sylvie Brett -- (Photo by: Matt Dinerstein/NBC)

Chicago Fire season 8, episode 4 preview: Infection, Part 1

CHICAGO P.D.- "Infection Part III" Episode 707 -- Pictured: (l-r) Marina Squerciati as Officer Kim Burgess, Patrick John Flueger as Officer Adam Ruzek -- (Photo by: Matt DinersteinNBC)

Chicago PD season 7, episode 4 photos: Infection, Part 3

CHICAGO MED- "Infection Part II" Episode 506 -- Pictured: (l-r) Lisseth Chavez as Vanessa Rojas, Brian Tee as Dr. Ethan Choi -- (Photo by: Liz SissonNBC)

Chicago Med season 5, episode 4 photos: Infection, Part 2

Arrow -- "Starling City" -- Image Number: AR801a_0221b.jpg -- Pictured: Colin Donnell as Tommy Merlyn -- Photo: Dean Buscher/The CW -- © 2019 The CW Network, LLC. All Rights Reserved.

Chicago Med’s Colin Donnell guest stars in Arrow season 8 premiere

CHICAGO FIRE -- "Infection, Part I" Episode 805 -- Pictured: Eamonn Walker as Battalion Chief Wallace Boden -- (Photo by: Matt Dinerstein/NBC)

Chicago Fire season 8, episode 4 photos: Infection, Part 1

CHICAGO P.D.- "Infection Part III" Episode 707 -- Pictured: (l-r) Lisseth Chavez as Vanessa Rojas, Marina Squerciati as Officer Kim Burgess, Patrick John Flueger as Officer Adam Ruzek -- (Photo by: Matt DinersteinNBC)

Chicago PD season 7, episode 4 synopsis and promo: Infection, Part 3

CHICAGO MED- "Infection Part II" Episode 506 -- Pictured: (l-r) Oliver Platt as Dr. Daniel Charles, S. Epatha Merkerson as Sharon Goodwin -- (Photo by: Liz SissonNBC)

Chicago Med season 5, episode 4 synopsis and promo: Infection, Part 2

CHICAGO FIRE -- "Infection, Part I" Episode 805 -- Pictured: (l-r) Miranda Rae Mayo as Stella Kidd, LaRoyce Hawkins as Officer Kevin Atwater, Torrey DeVitto as Dr. Natalie Manning, Tracy Spiridakos as Det. Hailey Upton, Kara Killmer as Sylvie Brett, Taylor Kinney as Lt. Kelly Selly Severide, Jesse Spencer as Matthew Casey -- (Photo by: Sandy Morris/NBC)

Chicago Fire season 8, episode 4 synopsis and promo: Infection, Part 1

CHICAGO FIRE -- "Infection, Part I" Episode 805 -- Pictured: (l-r) Taylor Kinney as Lt. Kelly Severide, Jesse Spencer as Matthew Casey, Kara Killmer as Sylvie Brett, Jesse Lee Soffer as Det. Jay Halstead -- (Photo by: Matt Dinerstein/NBC)

One Chicago crossover preview: ‘Mass destruction’ in Chicago?

One Chicago franchise 2019-2020 season key art featuring the casts of Chicago Fire, Chicago PD and Chicago Med. Photo Credit: Courtesy of NBC.

One Chicago ratings report: Week of Oct. 9, 2019

CHICAGO P.D. -- "Familia" Episode 704 -- Pictured: Jason Beghe as Sgt. Hank Voight -- (Photo by: Matt Dinerstein/NBC)

Chicago PD season 7, episode 3 takeaways: Familia