Debate whether instinct or intelligence is more important; Zak and Syd decide to go back to the shed.

Zak takes advantage of Chowser's admiration; Willow has to overcome her fear of heights.

Chowser tries to convince the team he's seen a zombie; The Insectibles name is being sullied across the yard.

Zak visits his bug-scientist grandpa; Zak sets out on his first hunt for a missing Shrinkinator part.

Adilla is called away and leaves her daughter Lidia in charge; Zak gets a family of dust mites to do his bidding.

Syd finds himself under a spell of a lady snail; Spring has sprung, and with it a disappearance.

The Insectibles pretend to be a group of actors; Zak goes on a daring but comically misguided mission to disguise himself.

Syd gets more than he bargained for; when all of the team's bionics go on the fritz, Gramps has to race to find a solution.

Zak embarks on a series of incredible adventures; A primitive tribe of flies is discovered by the Insectibles.

Gramps and Zak are swallowed by the koi in the pond; Prisoners Zak and Willow are put to the ultimate task.

Zak wanders off to join a tribe of ants; Zak learns why Syd is so cynical when he meets the snail's childhood friends.

The team stumbles across Zak's long lost toy robot; The Insectibles encounter a bar magnet in the yard.

The team brings Gnat back to the shed; Using the powers of the shrinkator, Zak embarks on a series of incredible adventu

Willow gets trapped under a glass; Grandpa's invention accidentally shrinks both Zak and Grandpa.

Willow starts up her own detective agency; Chowser has been transformed into a beautiful butterfly.

Adilla fires Hye and Lo; Zak, Willow and Gramps search for a shrinkinator part.

Zak embarks on a series of incredible adventures.; A crazy black ant believes the end of the world has come.

Chowser is transformed into a butterfly; Grandpa and Zac have Tanagra flu.

When Zak's mother sends a pizza to Zak and Gramps; The Insectibles name is being sullied across the yard.

Gramps' test of the Shrinkinator goes wrong; Adilla's abrasive personality is making it hard to negotiate.

Using the powers of the shrinkator, Zak embarks on a series of incredible adventures.R; Zak grows a little bigger.

Grandpa accidentally shrinks both Zak and himself; Zak finds a prototype jetpack in Gramps' lab.

Zak embarks on a series of incredible adventures.; the team is faced with the toughest challenge.

Hye and Lo get zapped with a ray that makes them smart; Zak embarks on a series of incredible adventures.

Willow’s drill motor was taken from an old remote control car; The cockroaches find a magic ball.

Zak and Gramps find the last piece to the Shrinkinator - but a mysterious, giant foe finds them.