One example I can think of is the crossover episodes that multiple Disney channel shows would occasionally have, one being the tv special “That’s So Suite Life of Hannah Montana.” In these episodes, multiple characters from different Disney channel shows would all collide and thus establish that all these characters took place in the same world. These episodes established that while the rest of the episodes may seem to take place in their own world, they are all a part of a larger universe that is simultaneously connected and separate.