Lt. Danny Walback is a firefighter for the Chicago Fire Department. He filled in for Matthew Casey on Truck 81 while he was preparing to depart for Oregon to look after the Darden boys. He has a tendency to be overly generous with his compliments, calling every unit 'the best in CPD' and overusing the word 'awesome'. Randall McHolland finds this trait to be somewhat annoying.
While Stella was recovering from injuries sustained in the process of saving Seth Pryma from an explosion, Walback again filled in.
Trivia[]
Walback is mentioned as filling in for Stella Kidd while she was recovering from her injuries in Something for the Pain but he does not appear on screen, as the episode time skips to when Stella returns to her duties.