Ancient Troglodytes

The Doctor speculates that ancient troglodytes built the compression chamber where he and his companions awaken after temporal displacement. He envisions them as primitive cave-dwellers with engineering skills matching the chamber's design. Polly disproves this theory by spotting an Aztec bracelet from the 1968 Mexico Olympics, confirming a 1970 origin. No members, structures, or activities confirm their involvement or existence.