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Check your inner loop. For starters why is it looping numTheaters times? What if the numTheaters was 10 but the first theater only had 2 movies, it would try and loop 8 more times.

No you would need to nest the loops inside each other.

for each theatre {
get list of movies
for each movie {
do something
}
}

You have one loop iterating over the theaterObject array. What about the movieList array?