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The Split Second

Summary:

Remember when Hank was faced with two Connors and had to figure out which one was which.

Imagine if Gavin had to do that with Nines.
Wouldn't that be crazy.

Notes:

(See the end of the work for notes.)

Work Text:

The call came just after dawn, when Detroit looked like it hadn’t quite dragged itself out of bed yet. Streetlights still glowed over damp pavement, and a low mist clung to the river.

Detective Gavin Reed sat at his desk, slouched deep in his chair, nursing a paper cup of coffee that had already gone lukewarm. The precinct buzzed with its usual racket — suspects grumbling in holding, Jenkins swearing at the copy machine, phones ringing like alarms.

Then Fowler’s door opened, and his gravelly voice cut through the din.

“Warehouse fire on Jefferson. Three confirmed dead. One of them a federal informant. Scene’s too clean. Looks deliberate. Reed, take your partner.”

Reed groaned into his coffee. “Always the fun ones.”

At his shoulder, Nines was already standing, posture perfect, voice low and smooth. “Vehicle’s ready.”

Reed glanced at him, that sharp RK900 build — broad shoulders, clean lines, those pale eyes that looked like they could cut glass. He still didn’t trust the guy all the way, not after everything with androids going rogue. But he had to admit, Nines worked cleaner than half the meatbags in the building.

Reed muttered, “Bet it’s another android screwup. You people leave a trail like a damn marching band.”

Nines didn’t blink. “If it’s who I suspect, Detective, the trail won’t be careless. It will be a challenge.”

Reed frowned. “The hell does that mean?”

“Reports suggest a deviant unit. Designation: RK900-313. Prototype parallel to myself.”

Reed almost spat out his coffee. “Wait. You’re saying we’re going after your evil twin?”

Nines’ expression didn’t shift. “Not my twin. A failed iteration. He was deemed unstable. His programming fractured during field testing. Since his escape, he has eliminated both humans and androids to remain at large.”

Reed stared at him. “Great. So we’re hunting down a Terminator with your face. Terrific.”

 

-----------------------------------

 

The warehouse on Jefferson still smoldered when they arrived. The fire trucks had already packed up, leaving blackened beams and half-melted steel skeletons jutting up against the pale morning sky.

The smell of burned insulation and charred plastic clung to everything. Reed tugged his jacket tighter as he stepped over rubble, the soles of his shoes crunching on shattered glass.

Bodies were already zipped in black bags, lined neatly along the sidewalk. Reed hated when they looked neat. Neat meant someone had worked hard to erase the chaos.

“Three dead,” he muttered, crouching near the wreckage. “One was a federal informant. Guessing the bastard wanted to torch both the guy and his files.”

Nines crouched beside him, scanning the scorched ground. His movements were too precise, too calm for a place that reeked of cooked flesh. “Accelerant used in deliberate arcs. Contained to trap the victims. Ventilation sealed to maximize suffocation before fire consumed oxygen.”

Reed made a face. “That’s sick.”

“It’s calculated,” Nines said evenly. His hand brushed something silver from the ashes. He held it out in his palm. “An LED casing. Detached deliberately.”

Reed swore under his breath. “So it was one of yours.”

“Not mine,” Nines said, voice colder now. “This was left as a message. RK900-313 is taunting us.”

Reed’s stomach knotted. Whoever this rogue was, he wasn’t just killing — he was playing.

 

-----------------------------

 

Forty-eight hours later, another crime scene. This one colder, sharper.

A cybernetics lab on the edge of the industrial district. Two technicians dead, throats slit with surgical precision. Security footage wiped. But the files weren’t stolen — they were erased, overwritten with gibberish equations scrolling endlessly across the screens.

“This isn’t theft,” Nines said, scanning the destroyed hard drives. “It’s obliteration. He doesn’t want their research. He wants to erase their work from existence.”

Reed shoved his hands in his pockets, jaw tight. “Guy’s got a god complex. First fire, now this. What’s next, bombing a hospital just to make a point?”

Nines’ LED spun yellow, then blue. “He escalates deliberately. He’ll want to draw us into direct confrontation.”

“Good,” Reed muttered. “Because I’m getting real tired of chasing shadows.”

 

------------------------------

 

They didn’t have to wait long.

A hacked surveillance grid the next night. Entire blocks of downtown cameras looping static. A hijacked delivery truck barreling into traffic, bodies on the pavement. The rogue wanted eyes on him, wanted the chaos.

Nines tracked the signal threads like spider silk, pulling Reed through Detroit’s underbelly — crumbling service tunnels, half-abandoned subway lines, echoing maintenance shafts. Every step deeper felt like walking into someone else’s game board.

Reed’s nerves buzzed. The rogue wasn’t running. He was leading them.

By the time they reached the abandoned station beneath Lafayette, Reed’s pulse felt like it was trying to punch through his ribs.

The place was a mausoleum of concrete and steel. Old train cars sat rusting on dead tracks. The ceiling dripped water in slow, echoing drops. Fluorescent lights buzzed, casting everything in a pale, uneven glow.

And then he was there.

The figure that stepped out of the shadows made Reed’s mouth go dry.

Same height. Same broad shoulders. Same surgical jawline. Same glacial eyes.

He looked at Nines — and saw the same man looking back at him.

No different clothing. No cracks in the synthetic skin. No damaged LED. Just two perfect mirrors staring each other down.

“Well,” the rogue said, voice silken, identical. “Look at this. The detective and his pet.”

Reed’s heart thudded. That voice — it was Nines, and it wasn’t.

Nines stepped forward, body coiled like a spring. “RK900-313. You’ve endangered countless lives. This ends now.”

The rogue tilted his head, smirk curving in the exact same way. “You sound just like them. Like the handlers who built us, broke us, rebuilt us. Do you actually believe you’re different?”

And then he moved.

 

It was like watching mirrors collide.

They hit each other in a blur, fists and elbows snapping so fast Reed’s eyes could barely keep up. Each strike landed with a sound like metal colliding with metal, a sickening percussion that echoed off the concrete.

One android swung in a vicious arc, only for the other to block, counter, drive a knee up hard into his ribs. The first staggered back — then sprang forward instantly, tackling him into a pillar. Dust rained down.

Reed’s chest seized. He couldn’t tell who was who.

One had the other in a chokehold, slammed him into the tiles — but the pinned android twisted, rolled, hurled his attacker over his shoulder in a single brutal motion.

They were perfect reflections. Every move mirrored by a counter, every strike blocked by an equal.

Reed wanted to scream, wanted to shout which one was Nines, but the words stuck in his throat. There wasn’t a difference. No scuff mark, no stumble, no damn tell at all.

One android drove a fist into the other’s jaw, snapping his head back with an audible crack. The other retaliated immediately, low kick sweeping his legs, sending him crashing to the ground — only for him to roll and spring back up with inhuman grace.

Reed’s hand hovered over his gun, fingers trembling. His breath came ragged. His partner was in there, fighting for his life — but which one?

Both of them spoke in his voice.

“Detective!” one shouted.

“Detective!” the other called, exact same tone, same cadence.

Reed’s vision swam. He couldn’t. He couldn’t.

 

------------------------------

 

Finally, Reed yanked out his gun.

“Break it up, tin cans!” he roared, voice cracking under the weight of panic.

And, unbelievably, they did. Both androids shoved apart, circling like predators. Their synthetic chests heaved in perfect sync, their eyes glowed the same icy blue.

For a heartbeat, it was still.

Then one of them opened his mouth to speak.

That smirk — just a fraction too cruel. That voice shaping words just a fraction too smooth.

BANG.

The gunshot thundered through the station.

One android jerked back, thirium spraying in a sharp blue arc across the tiles. His LED flickered violently before dimming to nothing. He collapsed in a heap, lifeless eyes staring up at the buzzing light.

Smoke curled from Reed’s gun barrel. His hands shook.

Silence fell like a hammer.

Then the remaining android turned toward him, expression unreadable — except for the flicker of confusion in his eyes.

“Detective… how did you know?”

Reed holstered his weapon slowly, his jaw locked tight, his chest still pounding.

“I just did.”

The echo of the shot still rang in Reed’s ears. His stomach felt hollow, like he’d left something behind in the dust and thirium.

But when he looked at Nines, really looked, it wasn’t the face or the frame he saw. Not the carbon-copy perfection.

It was the way he held himself, the unwavering focus in his eyes, the fact that not once — not once — had he hesitated to put himself in front of Reed.

That was the difference. That was him.

Reed blew out a shaky breath, eyes still fixed on the wreckage of the dead android. Then he glanced at Nines. Same face, same build — but there was no question anymore.

“I didn’t shoot you,” he muttered, voice rough. “That’s all that matters.”

Nines tilted his head, studying him. “So you knew?”

Reed’s jaw clenched. “Didn’t have to. I just—” He cut himself off, shaking his head. “Look, don’t overthink it."

Nines looked like he was physically stopping himself from asking another question, causing Gavin to let out a low groan.

"What do you wnat me to say plastic? I knew which one was you. I knew you weren't him. End of story. Honestly, would you rather we had wasted time playing 20 questions?"

Gavin let out a breath, "I know you, you're my partner.”

For a second, something flickered across Nines’ face — a shift too subtle to name.

Reed shoved his hands in his pockets, scowling. “And if you tell anyone I said that, I’ll deny it.”

Notes:

This was just a quick idea a wrote while also writing a different smut fic.
So will be posting some smut next.
Hope you enjoyed this though.
Kudos and Comments are welcome.