Continuity mistake: While Roy and Johnny are studying, after hearing Roy's positive horoscope Johnny tells Chet his birthday is August 28th. However, in the pilot episode "The Wedsworth-Townsend Act," Dixie has a get-together as a combination celebration of John's birthday and gathering of the supporters of the paramedic program. At the party Dixie offers the hors d'oeuvres to Johnny saying, "You first, it's your birthday," as he takes a mouthful of food. During that week we see people wearing coats, and the many deciduous trees (not the evergreens and palms) in LA County have already lost their leaves, which means it's certainly not summertime, August 28th.
Continuity mistake: When Roy and John are helping Jeanine get her head unstuck from the table, Jeanine's braid is very loose and coming apart, but when her head is free and she jumps into her mother's arms, Jeanine's braid is braided properly.
Continuity mistake: After Dixie has the talk with Molly about using 51 as a crutch, it cuts to the shots at the movie studio with stunt drivers being chased, and the passenger who has his head out the car window is bareheaded, but in the closeup he's suddenly wearing a knit cap on his head.
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.