Until Dawn/Chapter 7

Sam
If Sam escaped the psycho in the fifth chapter, she'll be able to explore the psycho's lair by kicking down the grate in her path. This area is chock-full of collectibles, so make sure to scan every corner if you want the gold trophy for collecting all clues pertaining to the mystery man. As soon as you enter, begin by heading directly to the right; here is a cork board that you can interact with for Mystery Man Clue #26. In a desk drawer to the left is a folder that you can look through for Mystery Man Clue #30. To the left of the desk is a shelf holding a smartphone which you can unlock and scroll through for Mystery Man Clue #27. Continue forward and make a left turn. Hiding behind some boxes on a desk is a smaller cork board on the wall, which you can examine for Mystery Man Clue #28. Now head right and through the exit. Around a corner, enter the next room and head down the short set of steps. Across from them is a door with a peephole, which you can look through to catch a glimpse of the psycho. Walk past another set of stairs to find a table holding a tape recorder. Activate it for Mystery Man Clue #29. Now head up the stairs and make a right turn to find some blue double doors. Open them to enter another room, where you'll find the final set of clues. If Sam was caught by the psycho, this is where the chapter will begin for her. Examine the mannequin in Sam's clothes for Mystery Man Clue #24 and Mystery Man Clue #25 to earn the trophy and conclude your clue hunt. Approach the door to the left of the dummy to trigger a scene. Grab Sam's backpack and head down the stairs. Open the door to the left for another scene. Help push the door open for one final scene before a perspective switch.

Emily
Swing back and forth (psx: right rstick) until the wire Emily is hanging from gets cut, at which point you must press psx: C to hang on. With nowhere else to go, head into the tunnel. Emily will light a torch which should help with visibility. Just follow the path, continuing on down some stairs, until you reach a large, impassible wooden door. Follow the tracks left to find a mine cart and, to the left of the cart, a chest. Open it up to find 1952 Clue #15, a photograph. Interact with the cart to send it down the hill and through the door, opening up a path. There's an elevator here, but you can't use it just yet. Look across from the elevator to the right to find a clocking-in machine that you can examine for 1952 Clue #14. From here, head right until you find a ladder. A short walk behind the ladder, along some blocked-off mine cart tracks, is Death Totem #5.

Follow the only path forward and unlock the door to make it back to the elevator area. You can now use the elevator to head up, though be warned: this triggers an action sequence. To successfully clear this encounter and gain access to a missable 1952 clue, do the following: The story will then move back to the mansion, where the psychopath reveals himself.
 * Don't move.
 * Press psx: T and psx: T again to leap over some gaps in the scaffolding.
 * Aim with psx: neutral rstick and drop the torch with psx: R2 onto the pool of oil.
 * Choose to hide.

Chris
After the scene, you'll be presented with some conversation choices. Choose to scold rather than dismiss to improve your relationship with both Mike and Josh. Choose to be skeptical to improve your relationship with Josh. For the following choice, while being defensive has no effect, choosing to be aggressive will worsen your relationship with Josh. Finally, choose to disarm Mike in order to improve your relationship with Josh; choosing to knock Josh out instead will worsen your relationship with both Mike and Josh.

Now that you know the identity of the psychopath, there will be no more sessions with Dr. Hill, so the story will continue straight into the next chapter.