Michael G. answered 05/15/20
Ivy League Math Minor with 4+ Years of SAT Math Experience
Choosing the first movie, you have five choices.
Once you choose this first movie, you have four choices.
Continuing with this logic, by the time you get to the last choice, you'll only have one choice for the last movie.
Thus, there are 5*4*3*2*1=120 orders.