He kept guard over Jondar during his execution. When the TARDIS materialised, he thought it was the Punishment Dome playing tricks on his mind. However, when the Sixth Doctor and Peri Brown exited, they knocked Maldak out and escaped with Jondar.
He later kept guard over the Governor and Peri during the Governor's final vote. The Governor tried to persuade Maldak to let them go, but he refused. However, when the Governor began to be killed by by the human cell disintegrator, Maldak had a change of heart and destroyed the disintegrator. He then led the Governor and Peri through the air ducting to where the Doctor, Jondar and Areta were.