- Season 3 — Lab Rats

This was the only season where Donald Davenport (Hal Sparks) appeared in every single episode.

After his arm is crushed during a battle with Taylor (S-1), Leo finally joins the ranks of the bionic heroes with a powerful robotic arm. Lab Rats - Season 3

The Bionic Secret is Out: A Look Back at Lab Rats Season 3 Season 3 of Disney XD's remains a monumental turning point in the series, shifting from a "secret identity" sitcom to a high-stakes action-adventure . This season changed everything for the Davenport family, and looking back, it’s clear why it’s a fan favorite. The Secret No More This was the only season where Donald Davenport

Hal Sparks also stepped into the director’s chair for the episode "Brother Battle" . This season changed everything for the Davenport family,

The biggest earthquake of the season was undoubtedly the episode . For two years, Adam, Bree, and Chase hid their bionics from the world. In this hour-long special, their secret is finally leaked, forcing them to flee Mission Creek and eventually leading to the massive battle against Victor Krane . Major Character Evolutions