Zoe, Jaden, and Caleb are working on building and programming a robot dog, which Caleb thinks is bad enough, but the high-tech android called Dude that their teacher has brought in terrifies him--and when something starts damaging the android during the night, Caleb is convinced that Dude is turning himself on as part of a plot to take over the world.

Twins Mary-Kate and Ashley investigate when a series of strange events take place at a Halloween carnival.

The twins investigate attempts to sabotage the rock band in which they are playing.

When just ten kids from two cliques at Hubble Middle School get sick after eating in the cafeteria it seems like somebody is deliberately trying to poison them, and while there are several suspects for who might want to get back at the super-cool girls, the other group are the innocuous comic book buffs--so it is up to Zoe and the other members of the S.M.A.R.T.S. to solve the mystery.

When Mary-Kate and Ashley get to their great-grandmother's detective clubhouse, they discover that someone had broken in. Was it the singing dragon, the giant bunny, or the mysterious stranger that kept calling them?

Hubble Middle School just got a 3-D printer for the use of the S.M.A.R.T.S. club, but when somebody breaks into the school at night to use the printer, Zoe, Jaden, and Caleb are blamed--so the friends need to use their skills to prove their innocence, bring the troublemaker to justice, and save their club.

Mary-Kate and Ashley enter their basset hound, Clue, in the dog show and expect that he will win until someone steals him.