Continuity mistake: When Gail, Laurie, and Pete realize they forgot Melinda, Johnny is wearing his leather jacket when Roy says "Look, it's a boy," but in the next shot Johnny's jacket is gone when he asks what happened.
What's a Nice Girl Like You Doing...? - S7-E7
Visible crew/equipment: After the last rescue it cuts to Roy as he says, "We'll catch you all a little later," and when Roy walks away we can see the actor's T-mark on the floor, where he was just standing.
Greatest Rescues of Emergency - S7-E5
Other mistake: As the men are receiving their new badges and the chief congratulates them, he calls Craig Brice. The Brice that accepts the new rank is a black man. In all previous episodes, Brice is white.
Greatest Rescues of Emergency - S7-E5
Other mistake: After getting their promotions, Roy and Johnny start recalling their history together and when Johnny remembers joining the paramedic program he says he was at 8's, but Johnny was at 10's and it even shows the clip from the show's pilot where Johnny's standing behind Engine 10 talking with his Battalion Chief. The filming of the show's Station 10 was done at the real Station 8. As an aside, the real Station 8 was also seen in the 1950's TV show Rescue 8.
Other mistake: When dispatch drops tones for the fire at Graymar Plaza, we see Engine 8 rolling out of the apparatus bay and heading down the street, but the problem here is that this footage of Engine 8 is from season 5, episode "Equipment", when Johnny was at Station 8 doing overtime, and we can actually see Johnny sitting there on Engine 8 as it rolls by.
Other mistake: When Pete shows Laurie the newspaper, in the closeup of the article about Gail and Laurie entitled "women paramedics save shooting victims", the paragraphs under and around the title are repeated, and have nothing to do with the title.
Continuity mistake: When Charlie asks Dave how Sue is, Charlie has an oxygen mask on with the elastic around his head, but after Dave tells Charlie that Sue's fine and that Johnny's got her on O2, in the wideshot as Dave walks away the oxygen mask has vanished from around his head.
Continuity mistake: When Johnny tells Sue that Charlie's injury means paid vacation, Johnny is wearing his turnout gear and the coat has long sleeves, but in the closeup when he places the oxygen mask on Sue's face, the arms we see are bare.
Visible crew/equipment: When Evelyn and her husband pull up in front of Graymar Plaza, while they're talking in the car, in the shots facing Evelyn the reflection of crew members standing beside the car, on the driver's side, is visible on the building's glass doors.
Answer: I believe you are speaking of the old man, Mr. Wilson. He's played by J. Pat O'Malley.
Bishop73
Correct, it was J. Pat O'Malley...he also played the grandfather with his grandson when their rocket exploded, and also played "Old Bill" in the episode with Ann Prentiss, where Gage saves the little girl from the burning tree house, and her mother falls in love with him.