History Trivia / TheHardyBoys2020

** In a milder example, Alexander Elliot was 14 while playing 12-year-old Joe Hardy in the first season. It becomes more noticeable in the second two seasons, though, where Elliot is between 16-18 while filming, but Joe is still only 13. He has an audibly deeper voice in Seasons 2 and 3 thanks to Elliot hitting puberty, and in Season 3--the start of which takes place [[ImmediateSequel less than a week after the end of the previous one]]--Elliot has had a huge growth spurt between seasons and gotten a ''lot'' taller.

* TheMountainsOfIllinois: A climate example rather than geographical. Even though the first season is supposed to take place across the summer and early fall and the characters are accordingly shown wearing short-sleeved clothes indoors, at least a large portion of the season was quite clearly filmed during the winter for the outdoor scenes, which have everybody wearing long sleeves and jackets and the trees are all bare and leafless. One particular standout example is in "The Key", where a few characters' breaths can quite clearly be seen fogging up outside.

* UnderageCasting: Likely with Gloria, who's probably in her late sixties at the absolute youngest, more likely her early seventies. (Her actress, Linda Thorson, was around 73 at the time of filming the first season.) In the flashbacks to the day George left, which is 20-25 years ago, she would have been in her early-mid forties at the absolute youngest, probably older than that. While Aidan Morris looks the right age when playing Younger Gloria in Season 1, her [[TheOtherDarrin new actress]] in Seasons 2-3, Stephanie Moran, appears about 10 years younger than Gloria should be in the flashback scenes.

** In a non-Estabrook example: Adrian Munder, the Bridgeport teacher [[spoiler:who turns out to be the Shadow Man]], is played by Jake Epstein, [[spoiler:[[PlayingTheirOwnTwin as is his twin brother Aaron]]]]. Anton Gillis-Adelman portrays the teenage versions of [[spoiler:Adrian and Aaron]] in a flashback set 10 years earlier.

** In a non-Estabrook example: Adrian Munder, the Bridgeport teacher [[spoiler:who turns out to be the Shadow Man]], is played by Jake Epstein, [[spoiler:[[PlayingTheirOwnTwin as is his twin brother Aaron]]]]. The teenage versions of [[spoiler:Adrian and Aaron]] from a flashback set 10 years earlier are played by Anton Gillis-Adelman.

** George is only seen as an old man in the flashbacks [[spoiler:and inside the Crystal realm]], acted by Philip Craig; however, the Eye's [[AFormYouAreComfortableWith projection of him]] when speaking to Frank instead shows him in his younger days, also somewhere in his forties, where he's portrayed by Gray Powell.

** Meanwhile, Gloria's flashback self is most likely in her mid-forties (portrayed by Aidan Morris in the first season [[TheOtherDarrin and Stephanie Moran in the second two]]), while in the present day, as an old woman in her 70's, she's played by Linda Thorson.

* CaliforniaDoubling: Not a different location, but a different season. Even though the first season is supposed to take place across the summer and early fall and the characters are accordingly shown wearing short-sleeved clothes indoors, at least a large portion of the season was quite clearly filmed somewhere ''not'' warm (probably Canada) in the winter for the outdoor scenes, which have everybody wearing long sleeves and jackets and the trees are all bare and leafless. One particular standout example is in "The Key", where a few characters' breaths can quite clearly be seen fogging up outside.

* CaliforniaDoubling: A variant. Even though the first season is supposed to take place across the summer and early fall and the characters are accordingly shown wearing short-sleeved clothes indoors, at least a large portion of the season was quite clearly filmed somewhere ''not'' warm (probably Canada) in the winter for the outdoor scenes, which have everybody wearing long sleeves and jackets and the trees are all bare and leafless. One particular standout example is in "The Key", where a few characters' breaths can quite clearly be seen fogging up outside.

** Similarly, Keana Lyn (21-22) playing Callie Shaw, who's the same age as Frank.

** George Estabrook is only seen as an old man in the flashbacks [[spoiler:and inside the Crystal realm]], acted by Philip Craig; however, the Eye's [[AFormYouAreComfortableWith projection of him]] when speaking to Frank instead shows him in his younger days, also somewhere in his forties, where he's portrayed by Gray Powell.

** George Estabrook is only seen as an old man in the flashbacks [[spoiler:and inside the Crystal realm]], acted by Philip Craig; however, the Eye's [[AFormYouAreComfortableWith projection of him]] when speaking to Frank portrays him in his younger days, also somewhere in his forties, where he's portrayed by Gray Powell.

** Jennifer Hsiung plays Jessie Hooper, Biff's mom, for the first season, until she's replaced by Alli Chung for the second and third seasons.

** In a milder example, Alexander Elliot was 14 while playing 12-year-old Joe Hardy in the first season. The age gap is especially noticeable in the second season, where Joe is only 13 at most, but has an audibly deeper voice thanks to Elliot hitting puberty. It also stands out quite a bit in Season 3, the start of which takes place [[ImmediateSequel less than a week after the end of the previous one]], but Elliot has had a huge growth spurt between seasons and gotten a ''lot'' taller.

** In a milder example, Alexander Elliot was 14 while playing 12-year-old Joe Hardy in the first season. The age gap is especially noticeable in the second season, where Joe is only 13 at most, but has an audibly deeper voice thanks to Elliot hitting puberty.
* TheOtherDarrin: There are a couple of recasts of major supporting characters in Season 2:
** The Hardy Boys' father, Fenton Hardy, is played by James Tupper in Season 1, before he's recast by Anthony Lemke for Season 2.
** Jennifer Hsiung plays Jessie Hooper, Biff's mom, for the first season, until she's replaced by Alli Chung for the second season.

* ActingForTwo: [[spoiler:Rohan Campbell plays two different characters in the finale of Season 2 and early Season 3: Frank Hardy as always, and George Estabrook, who hijacked Frank's body. The Season 3 premiere is a particular example, where he changes between the two onscreen, once Joe deduces that he's an impostor: going from largely acting like Frank while George still tries to impersonate him, to his facial expression completely shifting and voice cadence changing once George drops the act.]]

* ActingForTwo: [[spoiler:Rohan Campbell plays two different characters in the finale of Season 2 and early Season 3: Frank Hardy as always, and George Estabrook, who hijacked Frank's body. In the Season 3 premiere, he pretty much changes between the two onscreen, once Joe deduces that he's an impostor: going from largely acting like Frank while George still tries to impersonate him, to his facial expression completely shifting and voice cadence changing once George drops the act.]]

* ActingForTwo: [[spoiler:Rohan Campbell plays two different characters in the finale of Season 2 and early Season 3: Frank Hardy as always, and George Estabrook, who hijacked Frank's body. In the Season 3 premiere, he pretty much changes between the two onscreen, once Joe deduces that he's an impostor: going from largely acting like Frank while George still tries to impersonate him, to his facial expression completely shifting and voice cadence changing once he drops the act.]]

** Jennifer Hsiung plays Jessie Hooper, Biff's mom, for the first season, until she's replaced by Alli Chung for the second season.
* StockFootageFailure: The same "motel room" set is used numerous times throughout the series for scenes with various characters who are temporarily staying in Bridgeport, even when the actual motels where they're rooming are different in-universe, which is obvious by the fact that all of these "different" rooms have the same layout and wallpaper. This makes it painfully easy to tell that, in the scenes near the end of Season 1 where Rupert and Fenton confront Kanika in the former's hotel room, the door that the characters use to supposedly "enter" and "exit" the motel room actually leads to the ''bathroom'', especially since this door doesn't have any kind of lock on it on the bedroom side, while the real front door with the chain-link lock can quite clearly be seen in the background.

* StockFootageFailure: The same "motel room" set is used numerous times throughout the series for scenes with various characters who are temporarily staying in Bridgeport, even when the actual motels where they're rooming are different in-universe, which is obvious by the fact that all of these "different" rooms have the same layout and wallpaper. This makes it painfully easy to tell that, in the scenes near the end of Season 1 where Rupert and Fenton confront Kanika in the former's hotel room, the door that the characters use to supposedly "enter" and "exit" the motel room actually leads to the ''bathroom'', especially since it's pretty easy to tell that this door doesn't have a lock on it, while the real entrance door with the chain-link lock can quite clearly be seen in the background.

* StockFootageFailure: The same "motel room" set is used numerous times throughout the series for scenes with various characters who are temporarily staying in Bridgeport, even when the actual motels where they're rooming are different in-universe, which is obvious by the fact that all of these "different" rooms have the same layout and wallpaper. This makes it painfully obvious that, in the scenes near the end of Season 1 where Rupert and Fenton confront Kanika in the former's hotel room, the door that the characters use to supposedly "enter" and "exit" the motel room actually leads to the ''bathroom'', especially since it's pretty easy to tell that this door doesn't have a lock on it, while the real entrance door with the chain-link lock can quite clearly be seen in the background.

** Jennifer Hsiung plays Jessie Hooper, Biff's mom, for the first season, until she's replaced by Alli Chung for the second season.

** Jennifer Hsiung plays Jessie Hooper, Biff's mom, for the first season, until she's replaced by Alli Chung for the second season.
* PlayingGertrude: A literal example: Bea Santos was 30 years old at the time of filming the first season, while playing Gertrude "Trudy" Hardy. James Tupper, who plays Trudy's brother Fenton for the first season, was 55, old enough to be her father, and she's only 7-8 years older than Rohan Campbell, who plays her nephew Frank. While it's implied that Trudy is the younger sibling in this series (unlike the books, where Gertrude is the oldest), dialogue about their childhood indicates that the age gap between her and Fenton isn't meant to be anywhere near that large.

* TheOtherDarren: There are a couple of recasts of major supporting characters in Season 2: