They were stored in one of the Mechs. Miss Martian claimed she had won the right to become her uncle's sidekick after winning a competition on Mars,  though in reality she stowed away aboard his ship during one of his trips from his home planet. Garfield was soon adopted by the Team. The plan worked, and the force field receded.
Arsenal and four superpowered, former Reach captives rescued the captive Team members. December 30 , Part 2 Young Justice.