In "Return to Super Adventure Land", Amy was replaced for the role Gabe's Mom by Gabe's (actual) mom.
A subversion in "The Bob Duncan Experience": During her video diary, Teddy starts to say "When life hands you lemons, make lemonade." This would have been a sly reference to Bridgit Mendler's role as Olivia in Lemonade Mouth, the final scene of which has the saying flashing on video screens behind the band, except that Teddy substitutes "go to the prom with Emmett" for "make lemonade."
Artistic License – Biology: It's genetically impossible for two blondes to have brunette sons (unless one of them is not actually a Natural Blonde).
It is possible that Amy is not a natural blonde, her sister is a brunette.
Spencer and Emmet both can dance and they have a dance-off in which they take turns serving each other.
Spencer also sings part of "One Step Closer" (a song on Shane Harper's self titled album) during a talent show.
Teddy has a few chances to sing on the show, once for a talent show, a contest, and an audition for a school musical.
Her friend Skyler does a duet with Teddy for the talent show, but they combine with PJ and Emmet's band and mash-up both songs and subsequently win the talent show.
Leigh-Allyn Baker appears for have professional dance training, and Amy Duncan tries to teach her family simple and complicated dance moves and routines in an episode when she wants them to do a song and dance number for her hospital's fundraiser. When they don't even try to duplicate what she just showed them, she asks, "what are you waiting for?" and Teddy says "10 years for dance lessons." Which may be a hint to Leigh-Allyn having dance training, or could just be a joke, or both. She even gets an applause track played after the more complicated part of her routine, probably pointing to the former.
Then there's also Victor, who sings very well in an episode, as his actor, Kevin Covais was a finalist in American Idol.
Dawson Casting: Most of the actors are older than their characters. Bridgit Mendler is about three years older than Teddy, Jason Dolley is about two years older than PJ, When the show first started, Gabe was supposed to be 10, making Bradley Steven Perry two years older. Amy and Bob were supposed to be high school sweethearts. Leigh Allyn-Baker was 37 when the show first started and Eric Allan Kramer was about 10 years older. Gabe and Charlie are around the same age as their actors portraying them—give or take one year.
Directed by Cast Member: Eric Allan Kramer ("Wentz's Weather Girls" and "Rat-A-Teddy") and Leigh-Allyn Baker ("Charlie Whisperer" and "Bob's Beau-Be-Gone").
Irony as She Is Cast: PJ is dimwitted and a poor guitarist (which is debatable), but Jason Dolley had a 4.0 GPA in high school and is able to play guitar and piano.
Missing Episode: "Down a Tree," the episode featuring the controversial same-sex couple, was skipped in its run in Latin America and Brazil. Oddly enough, the episode was dubbed in Spanish and aired on Disney Channel US's alternate audio track. Some European countries didn't air it either, including Russia.
The episode eventually made it to Netflix for Latin America and Brazil, and Kanal Disney's YouTube for Russia. It was also skipped in the Czech Republic during its run on Disney Channel, but it eventually aired on a national channel. All dubbed, of course.
Write Who You Know: In the episode "Return to Super Adventure Land," Gabe says that the mom they got to replace Amy for the commercial looks more like his mom than Amy does. One sure hopes she would - that's Kimberly Perry, Bradley Steven Perry's real-life mom!
Samantha Boscarino (Skyler) has been Bridgit Mendler's best friend since they were 13 (Samantha got Bridgit into the singing and acting business in the first place).