Should you wish to pass checks for exp/other cheevo progress, you'll need at least 5-6 intelligence.
Other requirements: 40 lie, 40 engineering, 100 intimidate.
Respec at The Unreliable (the left ladder in the bay Ellie frequents) if you need to.
Steps to theatre
Upon landing on Byzantium, you are required to take an elevator up to the higher levels. Its unmissable.
Hang a left at the top (the only option really) hang another left, and shortly on your right, a snazzy dressed fellow named Maverian Johnston is standing beside a drone.
Talk to him, accept his proposal to get the "at central" side quest.
Follow the quest marker to the studio, take the elevator on the left down upon entering, talk to the intercom (quest markered) and agree to what it says. Enter the room, approach the actor.
(Through many comments and testing) you at this point, may;
*kill the actors
*pass the following speech checks as I did:
100 intimidate (see edit)
*FAIL your checks
*Pick random choices
After the scene, talk to the director (door directly behind the actor)
Cheevo pops after you talk to him.
Happy hunting (>*_*)>
EDIT 3: Comments are welcome tho wishing for no more PMs on the matter, the solution has been reformatted. I will update a final time should a title update make this change