Clearing out the billiards room (37) completes the directive and automatically triggers a long cutscene. Watch as Galahad and Igraine finally meet up with General Lafayette, who chats with an admirer. Galahad also spots Perceval in the street conversing with a mysterious, hooded fellow. Then the Knight trio descends into the London Underground, Mayfair.
Pursue the remaining escapees
Galahad sends Igraine and Lafayette one way then heads through another entrance alone (38). As he heads downstairs, Air Command calls in to report overhead sweeps of the Mayfair area looking for escaped patients. Follow the main tiled passage; you can explore a couple of side rooms (39, 40) along the way, but you won’t find much of interest. You hear voices up ahead—a fellow named Wickes seems to have made a grisly discover of some sort. But you encounter no resistance.
When you reach a locked gate in the main corridor, veer right into another generator room (41); you get a comm report from Igraine and Lafayette. Eventually you climb a staircase (42) with red metal banisters that leads up to a brick wall (43). Move toward the wall and press 
to jump up and grab the ledge atop the wall.
Slide your hands to the right along the ledge then around the corner until you reach the gap (44). While pushing the left stick toward the other side, press to jump across to the red metal platform, then push the stick forward to climb up. Lady Igraine calls to Galahad from a catwalk on the far wall: “Youth always prevails!”
Cross the cluttered platform and make another “traverse” move to leap across another gap (45) and grab the window-like opening in the brick wall opposite.
Pull yourself up to trigger a new scene: Galahad drops to the floor and encounters a tall, strange-looking escapee in hospital garb.
