Personal lifeAmy went back to labor, trusting her youngster to take care of Charlie. But when Bob falls of the stairs and his butt in pain, PJ has to take him to the hospital and Teddy has to take care of Charlie. In the hospital, PJ impersonate to be a doctor so as not to be known, but his camouflage is ruined when Amy finds out. She says she give up and can't handle it no more, but Bob tells her that everything's gonna be all right ("Study Date episode"). Teddy tells her parents that they needed to rest from baby Charlie, and that they should went out on a date. But then PJ takes Charlie to the amusement park and accidentally swaps strollers with a girl called Emma, and takes home the wrong baby. They do whatever they can to get back the baby, but in the end, they are caught by their parents and get grounded ("Baby Come Back episode").
Amy and Bob's anniversary is coming, Teddy wants to organize them the best day ever, but because of her sibling causes several matters ("Butt Dialing Duncans episode."). She is very excited about this.
It's revealed in Double Whammy that when he was younger he greatly looks like his son PJ, only to stop looking like him when his age reached 25.
Bob used to be member of a band named the Bob Duncan Experience but then he was kicked out. it is said that he got fired because of Amy always wanting attention.
Bob lost weight during the third season.
- His last two girlfriends (Amy and Katherine) were blondes.
- He was in a band called The Bob Duncan Experience.
- His middle name is William. (mentioned in Amy Needs a Shower)
- His birthday is somewhere past July 10th.
- Bob lost his good looks at age 25.
- He is one of two characters played by multiple people in different stages of life (played old P.J., Jason Dolley played young Bob).
- He does weight exercises with PJ.
- Bob can be compared to Jerry Russo in a few ways. They're both less strict than the wives and they both own their own businesses/companies.
- He can also be a compared to Eddie in That's So Raven as he is always eating and acts pretty fat.
- In Amazing Gracie, it appears that Bob Duncan has no friends because not only do people come for the rest of the Duncan family but also because nobody has come particularly for him.
- Like his wife, son and daughter, Bob is a very good singer ("The Bob Duncan Experience")
- Bob lost weight in Season 3, which became a plot point in "The Charlie Whisperer "
- He likes Teddys boyfriend Beau.
- Bob was mistaken for Toby's grandpa which is why he started to dress like a teenage boy
- Gabe made Bob wear a girls shirt
- Bob is lazy
- Bob has his own food names including Boblet, Bobwich etc
- Bob is sometimes compared to Amy's old highschool romance Bob Diddlebock.
source: good luck charlie wiki