In His Majesty's Secret Service

S4, E4: Since the Cloud of Monstrox and Jestro are unaware of Clay’s situation, the NEXO KNIGHTS decide to let him go undercover and infiltrate the Stone Stompers. Clay gets the help of Jack Shields, who is his majesty’s secret agent specialist in infiltration and espionage. Clay trains in how to remain silent and unnoticed, a challenge for a man in armor plates. Robin is intrigued by all the cool agent gadgets and follows Clay from a distance. Clay convinces Jestro and the Cloud of Monstrox that he is still evil. Jestro spills their scheme of using the Forbidden Powers to unlock the Stone Colossus. They find Robin spying outside their camp. Clay lets him go and his cover is blown. He gets captured by General Garg. Luckily, the Nexo Knights have been following ready to intercept. They free Clay and fight the Stone Stompers. In that fight, Clay goes “berserk” and the Knights are shocked by his behavior. When he fights Ruina (Witch) something holds him back. We are left wondering how that can be.