Actor Allusion: In "The Tale of the Dead Man's Float", Kaj-Erik Eriksen (Zeke) also tried to save someone from drowning in the Goosebumps episode "Welcome To Camp Nightmare".
Dawson Casting: Jennifer Irwin (later of Still Standing) plays it straight by a year in "The Tale of Locker 22", as Irwin was 18 in 1993 and her character Candy Warren was 17 when she died in 1968. It is inverted near the end when, thanks to a little life-saving time-tinkering, she grows up to be a 42-year-old principal at high school (even though the actress who played her was still 18 at the time).
As one reviewer put it, Goosebumps tended to be lighthearted, but most books ended with a Downer Ending (the TV adaption sometimes toned this down.) Are You Afraid of the Dark? was the opposite: episodes tended to be creepy as sin until the end, with most episodes having a happy ending.
Hilariously, in a combination of the anthology nature of the series and Canadian acting unions, many Canadian child actors who appeared in the tales would later play characters in Goosebumps.
Fake Nationality: American Joanna Garcia regularly commuted from Florida to play Sam on the show. Added to that, American actors often guest starred in the stories, usually a child or teen star that was popular at the time (some examples include Melissa Joan Hart, Tatyana Ali, Tia and Tamera Mowry, Ryan Gosling, etc).
Hey, It's That Guy!: There had been quite a few over the years, to the point where Wikipedia's episode listing lists actors from each episode who went on to become famous.
Tatyana M. Ali, who played Ashley Banks on The Fresh Prince of Bel-Air, had a dual role in "The Tale of Quicksilver" as a girl who died trying to rid her room of a demon and the dead girl's twin sister.