Synopsis: Gumball and Darwin saving Tobias from Underground Plot: Tobias is on his way home using a subway. As he attempts to depart the platform, a zombie attacks him. He shoves back the creature only to find a whole horde of them on the platform. He makes it to the exit, pushing a zombie down the escalator on the way. He tries to get past the gates with his pass but it is rejected and the computer tells him to seek assistance, but the man at the desk has been killed by the zombie When he reaches the exit it turns out to be locked so he calls home. Tom answers but only asks why they have to save him. Matt reveals that he has stolen the emergency 6 pack of Coke, forcing the gang to go and rescue him.
On their way there, they see a zombie infested mall, a haunted graveyard, and an old house. Thinking the old house was safe, they went inside. Ten minutes later, it turns out to have been the worst possible route and the three have to fight off a zombie horde then end up locked in a bathroom. Meanwhile, Tobias searches for a weapon to fend off the horde. He grabs a monkey with cymbals and throws it behind him, believing it to be too predictable, but it ends up killing the zombie sneaking up behind him. Instead, he finds a mop and tests it out by killing 2 zombies, then sees the blood they've spilt and starts to mop it up.