In Zim's base...

Dib: *is sitting at Zim's supercomputer. looks up at download progress bar* 76%! just a few more minutes and i'll have everything i need to expose him!

Computer voice: *beep* dimensional warp vortex powering up

Dib: what!?!? *runs over to the source of the noise in time to see the hulking form of the Megadoomer emerge from the portal. He dodges a volley of lasers and rockets from the mech and runs for the door only to discover it's locked*

Zim: stupid human! I laugh at your pitiful attempt at fleeing your inevitable doom! Here I go: MWAHAHAHAHAHAHAHAHAHA!!! Now, Dib *aims multiple gunsights at his head* this ends *fires*

Dib: *under cover of gunsmoke he desperately jumps into the overhead air shaft and begins crawling away*

Zim: mwahahahaha (*the smoke clears*) huh???? Where are the bloodstains on the walls? *notices the open ventilation grate* he escaped again?!?! *fires two homing missiles up the air shaft and dons a gas mask* computer! Release sleeping gas through the ventilation system! I want the earth boy found!

Dib: *a dim light shines through the grate in the distance* the exit! wait, what's that hissing sound? *looks behind him and sees the rapidly approaching cloud of green gas* is that the best you can do, Zim? *rips open a panel in the shaft and flips a few switches. air from the outside rushes to drive back the gas cloud. Dib is too busy congratulating sound to notice the mechanized whine of the homing missiles* AAAAA!! *dives down a nearby shaft and falls into the kitchen, then runs for the door, pushing the roboparents out of the way, and continues running down the street to his house*

Zim: *watches Dib escape on the security camera screens* you win this round, stinking earth creature, but be warned. soon i will have enough power to destroy you once and for all...

At Dib's house..

Dib: *comes bursting through the door and locks it behind him, gasping for breath*

Gaz: what now?

Dib: Zim...trying to kill me...dimensional warp...*collapses on the floor*

Gaz: *walks over and kicks him*

Dib: *gets up* hey, wait a sec! that GIR thing he's always yelling at? it wasn't there with him! I bet it was through that dimensional warp gate*runs to his dad's lab and starts searching it*

Gaz: you're going back after he almost killed you?psycho...hey, why am i complaining? Dib's doomed!

Dib: i have to sneak into that warp portal and find that robot. then i can capture him and get him to tell me everything! *keeps looking through stuff* there's got to be something in here that will help me *looks a while longer then exits the room with a large amount of junk in his arms and stuffs it into a backpack* dunno how long i'll be gone. if dad asks where i am, tell him i'm at a friend's house *rushes out the door with the backpack slung over one shoulder*

In front of Zim's house...

Dib: *takes a gas mask and a long coil of nylon rope out from the backpack, puts the mask on, and puts the rope on his shoulder. he picks up a rock, tosses it at the side fence, and is rewarded with a dull thud. while all the gnomes are looking to see where the sound came from, he slinks past and crawls through the window, half expecting Zim to see him and vaporize him, but to his relief, there's no sign of Zim. He takes the grappling hook rope from off his shoulder and throws it up into the tangle of cables in the ceiling. It latches on to something and Dib wastes no time getting to the top. just as he finishes pulling the rope up behind him, Zim rises from the toilet-elevator in the kitchen and walks out the door, muttering "time to go spy on Dib!". Dib smiles evilly as he takes out his magnetic gloves and boots and begins crawling toward the kitchen ceiling. After positioning himself above the trash can elevator, he secures the rope above it and zips down into the elevator shaft. Tightening hs grip on the rope to stop himself, he pauses at a floor in which something inside is emitting a loud humming sound. he looks through the ventilation grate and sees the portal. AFter a brief struggle trying to get the grate open, he pushes himself through the hole where the grate was and takes a quick look at the destination screen before diving into the warp vortex*