The interrogation room is a large room aboard the USS Enterprise-D that can be used for interrogations and hearings during courts martial or other judicial matters.
The room featured a circular raised dais with a single chair were the accused would be questioned. Interrogators would sit at either of two semi-circular desks placed at the base of the dais. Behind the desks, several rows of chairs could be arranged for observers if a hearing was open to the public.
The interrogation room was first seen in TNG: "The Defector" where it appeared much smaller than in its second appearance in TNG: "The Drumhead". On the set of the Enterprise the Interrogation room was located at a non-permanent corridor on the set, not connected to any permanent sets. This is indicated by a door with round-edges which can be seen through the open door of the Interrogation room. Such a rounded door was not part of the permanent corridor-set of the Enterprise-D.