This episode is the third part of a serial killer story arc that attempts to weave an historical group into a fictional back story.
Angela accurately identifies an inked image on a tapestry as a Gormogon symbol [00:16:20] .
While the scriptwriters have created an entirely fictional description of the Gormogons, the properties department is to be commended for actually reproducing one of the few images actually identified with the Gormogons: a medal currently in the British Museum.
Bones "The Knight on the Grid (2007). Directed by Dwight H. Little, written by Hart Hanson, Kathy Reichs. Emily Deschanel, David Boreanaz, Michaela Conlin, Eric Millegan, Tamara Taylor, T.J. Thyne, John Francis Daley, Ryan O'Neal, Patricia Belcher, Bess Wohl, Leon Russom, David Brisbin, Carlease Burke, James Immekus, Roxana Brusso. 43 min. USA, English, Colour, Stereo. 20 November 2007 (Season 3, Episode 8)