Take one existing show genre, add another, and presto! you've got a brand-new genre. The most famous example is Star Trek: The Original Series, pitched as a Wagon Train to the Stars (The Western + Space Opera). See also X Meets Y (for when it's works, not genres/tropes) and Recycled in Space (for when it's a work plus a genre or tropes). Compare and contrast Genre Busting. Examples of Mix and Match include: