Chicago Fire 8x20 "51's Original Bell" Season 8 Episode 20 Promo trailer HD (Season Finale) - When one of 51's own gets injured on a call, Lt.
Severide becomes obsessed with helping out.
Foster contemplates a big decision.
Kidd is concerned for one of her high school trainees.
Chicago Fire 8x20 Promo/Preview "51's Original Bell" (Season Finale) Chicago Fire Season 8 Episode 20 Promo Chicago Fire Season 8 Season Finale Promo Chicago Fire 8x20 Promo "51's Original Bell" (HD) Season Finale #ChicagoFire #OneChicago » Watch Chicago Fire Wednesdays at 9:00pm on NBC » Starring: Taylor Kinney, Jesse Spencer, Eamonn Walker