The rundown
Assassin Within (2026)
It shares its release window with Fall 2: Deadpoint, so expect the two fanbases to be reacting side by side.
Assassin Within arrives on streaming September 1, 2026.
Reactr / Trailer Reactions / Assassin Within
New here? Reactr is the free trailer reaction maker for creators: watch the trailer below, record your reaction on camera or voice only, and post the clip to your own channel. Studios and brands start here.
Streaming Release · September 1, 2026
Assassin Within
Trailer Reactions
Thriller · Science Fiction · Mystery · Action
The Greatest Threat Lies Within
A notorious assassin captured by an AI-controlled covert Agency, must navigate fractured versions of his identities to reach the system's hidden cores-and destroy it from within before his secrets are extracted.
Free · no editing · camera or voice only · the clip is yours to post
The Trailer
Start here: the official Assassin Within trailer
Dropped August 20, 2026
More Trailers
More Assassin Within trailers, newest first
Trailer: Assassin Within, Trailer
React to this trailer →
Teaser: Assassin Within, Teaser Trailer (2026)
React to this trailer →Behind the camera
The history behind Assassin Within
Woodforest Studios is producing. Cengiz Dervis directs. The finished film runs 1 hour 18 minutes.
On screen
Who you’ll see in the trailer
On screen, it is Cengiz Dervis, Silvia Busuioc and Rachel Brownhill carrying the story. Silvia Busuioc plays Aurelius.
Why this one is worth it
This trailer was made to be reacted to
A great action trailer front-loads its biggest swing and dares you to keep up. Catch the moment it lands.
Streaming releases live on word of mouth. A genuine reaction clip is word of mouth with a face on it.
Reactions on Reactr
Be one of the first to react
Reaction clips for Assassin Within will appear here as Reactors share them. The Reactr recorder is free for creators: watch the trailer, record on camera or voice only, and the finished clip is yours to post on your own TikTok, Reels, or Shorts channel.
Record the first reaction →FAQ
Assassin Within: quick answers
How do I make my own Assassin Within reaction video?
Open the reaction recorder on your phone at reactr.film/studio/assassin-within, choose camera or voice only, and press record while the trailer plays. Reactr captures your reaction and gives you a share-ready clip when the trailer ends. It is free.
Do I have to be on camera?
No. Voice Reaction mode records your commentary with the microphone only: the camera stays off, no face is recorded, and you still get a share-ready clip for your channel.
When does Assassin Within come out?
Assassin Within is scheduled to premiere on streaming on September 1, 2026. Dates can shift, so check back for updates.
Who stars in Assassin Within?
Cengiz Dervis, Silvia Busuioc, Rachel Brownhill, Daryl Jones and Lizzie Camp lead the cast, directed by Cengiz Dervis.
Is Reactr free?
Yes. Recording reaction clips on Reactr is free, with no paywall on the finished clip. You own your clip and can post it to TikTok, Reels, Shorts, or anywhere else. Reactr makes money from studios and sponsors, not from creators.
More trailers this season
Keep reacting
Hope
September 9, 2026
Insidious: Out of the Further
August 21, 2026
Fall 2: Deadpoint
September 2, 2026
The Fix
September 11, 2026
Runner
September 7, 2026
Resident Evil
September 18, 2026
Your first reaction only happens once
Watch the Assassin Within trailer, hit record on camera or voice only, and the clip is yours to post.
React to Assassin Within →Are you the rights holder of Assassin Within? Send us your press kit and this page is rebuilt from your material, with your assets handed to every creator who reacts.
Film data and images courtesy of TMDB. This product uses the TMDB API but is not endorsed or certified by TMDB.