This marks the first time in the series that none of the principal characters (Howard Silk, Peter & Claire Quayle, Emily Burton/Silk or their counterparts) are seen.
In the scene beginning at the 45 minute mark when the two Yaneks talk, the home is shown to be decorated in a grid and circle motif appearing m the wall papers the picture, the French door, and the table top, all reflecting the series motif of the game of Go with the grid and stones.