The Big Bang Theory returns Stateside next week – check out two brand new trailers from the season 8 double bill. 

***Warning Spoiler Alert!***

The hit comedy makes it's return in the US next week with Sheldon (Jim Parsons) returning to Pasadena after deciding to go travelling in the seventh season finale.

The first episode is called The Locomotion Interruption, and in the clip Sheldon tells girlfriend Amy (Mayim Bialik) that he wishes he had never gone on his trip. Leonard (Johnny Galecki) reveals that his roommate had spent the summer travelling across the country via train. 

Episode number two is entitled The Junior Professor Solution - the clip shows the group enjoying a discussion about theoretical inter-species relationships. 

The Big Bang Theory returns to CBS on Monday, Sept 22. UK broadcaster E4 has not yet confirmed when the episodes will air on this side of the world.