Sky History HD Sunday

A collection of original 1960s NBC posters arrive at the shop, and the team is asked to appraise a 1966 Harley Davidson

The pawnbrokers examine a medal with links to Captain Cook, and a putter from the famed 1963 Frank Sinatra Invitational. Plus, Rick's stress levels hit a new high

Strange black holes appear near Egypt's pyramids, ruins in Peru suggest the Incas knew more than may be imagined, and a mysterious red swarm invades a beach in India

A giant carving of a strange creature appears in the Australian Outback, and strange bright green lights illuminate the seas around Thailand

A buried monument offers new evidence about a huge Biblical mystery. A giant shadow engulfs the Pacific Ocean, and strange circular lake is home to unearthly life

A sinister giant swastika that appeared in a forest in Germany. Plus, mysterious markings spotted in an isolated corner of Antarctica - how did they get there?

Bizarre phenomena continue to be documented in the skies above Skinwalker Ranch, prompting astrophysicist Dr Travis Taylor to direct his investigations underground

Les remains in hospital following his collapse, and Seth and Ashley continue manning operations at the pawn shop. However, the bickering continues