A heart Cath is a procedure that is done to see if there are blockages to arteries supplying your heart with blood. The procedure is pretty simple - routine if you will. You are kind of placed in lala land - you dont feel anything.
Trilogy A trilogy is a set of three works of art that are connected, and that can be seen either as a single work or as three individual works. They are commonly found in literature, film, or video games.
A Thriller is a story that is usually a mix of fear and excitement. It has traits from the suspense genre and often from the action, adventure or mystery genres, but the level of terror makes it borderline horror fiction at times as well. It generally has a dark or serious theme, which also makes it similar to drama.