Gain access to the prison's main part using an empty prison cell | Episode 4 Remember Me Guide

Go right and jump to reach the platform above. You now need to keep grabbing onto the nearby ledges and shimmy to the right. Drop down onto the bigger balcony below. You do not really need to explore the balconies around because, you are not going to find anything of value. Approach the Cell Docking mechanism and interact with it.

Note that this calls in an empty cell shown in the above screenshot. Use the balconies around to get inside the cell and wait for Nilin to be transported into the main part of the prison.