The common area was thoroughly wrecked in The Invasion, Part 1 when the lair was discovered by the Kraang. Kraang Subprime (Irma's true identity) was temporarily defeated here when the spiral staircase fell on top of his unsuited body, apparently crushing him. After the Kraang were expelled from Earth in Battle for New York, Part 2, Splinter and the turtles reclaimed their lair in Casey Jones VS. The Underworld and repaired the damage to the living room.