"Target sighted, Numbuh 5!" Numbuh 2 said as the still-under-construction coffee rig was finally visible through the windshield of the ship. The rest of the team and Numbuh 111 approached the cockpit to take a look, standing on either side of the pilot.
"It doesn't look so big", Kuki commented. "This should be easy!"
"That's only the surface" Numbuh 111 informed her. "The coffee they detected is very deep under the Earth's crust. Deeper than they could reach without having their equipment melt. Until now. And we'll have to go down the whole thing to destroy it. And then-"
They were interrupted by a radio transmission from the coffee rig.
"Triple Espresso to Unidentified Ship", Cuppa Joe's voice said over the radio. "Identify yourself or have your ship shot out of the sky."
"We're spotted!" Hoagie realised. "What do we tell him?"
"Don't worry, I got this" Numbuh 111 told him as they activated the ship's communicator and cleared their throat.
"You know perfectly well who I am", they spoke into the microphone.
The four kids froze and stared at the teen, as the latter was now speaking in a completely different voice. A voice they knew all too well.
"Oh, I'd recognise that voice anywhere!" the radio replied. "We've been expecting you, Father! But why are you flying in-"
"Because those pesky Kids Next Door destroyed my ship so I took theirs", the time-traveller explained, still speaking in their perfect Father impersonation. "Now let me land this piece of junk already! I don't have all day!"
"Roger that, sir!"
The members of Sector V were still starring at their new ally in stunned silence.
"What?" Numbuh 111 asked. "I had to come up with something."
"How did you do that?" Numbuh 2 asked them.
"Can you do it again?" Numbuh 3 added.
"Who are you? For real?" Numbuh 5 questioned the teen.
The latter raised their gloved hands up and took a step back.
"W-what? I… I told you! I'm Numbuh 111! Jeez, you guys have never heard good impressions before? Anyway, we better land now : if we just stay there they'll get suspicious."
"Numbuh 2, land this ship", Abby ordered. "Numbuh 4, keep an eye on our friend."
"Alright, I'll keep an eye on him… her… whatever", Wally replied, crackling his knuckles in an attempt to look tougher.
Numbuh 111 rested their arms on their hips and impersonated the short boy's voice in a mocking tone :
"Ooooh, I'm Numbuh 4 and I apparently forgot the singular they is a thing! Maybe next time I talk about Numbuh 111 I'll frickin' remember it!"
"Hey, I don't sound like that!" Wally protested.
"This sounded exactly like Numbuh 4!" Kuki exclaimed. "Do it again!"
Hoagie landed the ship before the teen operative could reply. Now wasn't the time for impersonations anymore : the five youngsters had a mission to accomplish.
"'Guess we'll play later", the time traveller said while tinkering with the buttons on their wrist. "Everyone stay very close to me or the camouflage won't work."
The kids grouped around the teen and all five of them slowly walked out of the ship, hidden behind a holographic projection of their current environment.
"Future technology is cool!" Numbuh 2 said, a large smile on his face.
"And it would be even cooler to get inside before they realise the old man isn't actually here yet", Numbuh 111 replied.
Avoiding the construction crew the best they could, that the five youngsters entered the building in complete silence.
According to the time traveller, there were two main pipes plus two auxiliary ones to destroy. The plan was to split up in two groups once they were under the ocean so they could get the job done faster.
Numbuhs 3 and 4 were going with the time traveller ; Numbuh 2 decided to follow Abby.
"Man, the 2x4 technology of the future is so cool!" Hoagie exclaimed as he examined the small bombs given to him and Abby by Numbuh 111 before the group split up.
"Move it, Numbuh 2", Numbuh 5 told her teammate, "Numbuh 5's pretty sure the adults realised we tricked them by now. 'Better find the pipes before they send their mooks after us."
"Yes m'am!" Numbuh 2 replied while putting the bombs back in his pockets and picking up the pace to catch up on his leader.
The only sources of light down here were the flashlights attached to their weapons. Also, the temperature in the tunnel got hotter and hotter as they progressed. Hoagie was already covered in sweat and Abby would soon be as well.
A strange sound made both kids stop right there and look around, their flashlights only revealing dirt and rocks. Then, the wall seemed to tremble ; the second it started to split open, Numbuh 5 grabbed her comrade by his collar and tossed him forward right on time for him not to be hit by the high-pressure spurt of boiling hot coffee right behind them.
"Numbuh 5 really don't like this place", Abby said as she and Numbuh 2 started moving again, listening carefully to every sound and eyeing every inch of the tunnel suspiciously.
They reached the first auxiliary pipe a while later. A pool of boiling coffee surrounded it ; however a small bridge (probably constructed in case someone needed to repair the pipe) gave an easy access to it. They stuck some of Numbuh 111's small bombs all around it, backed away, turned their weapons on the bridge to destroy it and then moved on to the main pipe.
"Don't you feel too hot with all that stuff you're wearing?" Numbuh 4 asked. "It's at least eleventy billion degrees in here or somethin'!"
"Fire cannot kill a dragon" Numbuh 111 replied as they stuck their bombs around one of the two main pipes.
"What?" the short boy said, confused. "What the crud are you talking about?"
"Come on, Wally, it's not that hot!" Kuki stated. "If we could get a better lighting down here and cute decoration and some plushies and stuff, it would be per-fect!"
Numbuh 4 didn't know what to respond to any of this and didn't understand how the other two remained seemingly unaffected by the heat. He didn't get much time to think about it though, as he heard footsteps approaching from behind.
He and Numbuh 3 turned around and pointed their flashlights towards the source of the sound: a bunch of adults, most likely Cuppa Joe's minions, ready to fight against the Kids Next Door.
Now this was something Wally knew about very well : kicking adult butts.
He and Kuki started firing immediately to prevent the enemies from reaching the pipe. A few "ouch"s were heard but it was quite difficult to hit every target with so little lighting. As a result, a couple of mooks managed to reach the two kids ; however Numbuh 3 effortlessly evaded all attacks and Numbuh 4 leaped on the nearest adult to punch them in the guts.
The very next second, Numbuh 111 finished installing the bombs and joined their comrades in the fight, customised F.R.A.P.P.E.[1] in hand, and shot their freezing rays at the enemies.
Soon enough, everyone in the small group of adults was defeated or temporarily frozen, which basically amounted to the same thing.
"We should meet up with the rest of your team again before more adults come", the teen advised the kids. "And I bet the enemy is waiting for us up there…"
[1]F.R.A.P.P.E. : Numbuh 4 uses one in Operation L.I.Z.Z.I.E. if you want to look it up. Numbuh 111 customised theirs by writing their numbuh on it.