The Big Bang Theory: 21 Easter Eggs You Probably Missed
11. Game of Thrones Sword Stays In Position
This is one of the many props that feature once as part of a storyline yet remain visible throughout much of the series. Leonard and Sheldon invest in Jon Snow's Longclaw sword from Game of Thrones, sparking the episode into life, and after they hang it on the wall, it remains part of the set.
Many items follow a similar trend, with figurines, posters, comics, and other collectible objects all featuring as part of an episode before coming back in a 'recurring role' throughout the show. This adds to the realism and modern items keep the show current.