Show canned hints
It's important to notice that each image is generally made up of two items that fit in the blanks (separated by the dash).
The source material (that has since been jumbled up a bit) used to make the images is a well-known book/movie series.
The parts of these images are all derived from the Harry Potter series.
The images are derived from surnames within the Harry Potter series, where each picture is created from the first half of one surname and the second half of another.
By lining up the two halves of the characters’ surnames the order resolves itself into a cyclic list.
The blanks line up with each character's first name, not their surname. Use the numbers under the corresponding letter of the first name to *spell* out the answer.
January 15th 6:17 PM: The row of blanks with the numbers 10 and 14 was missing two blanks at the end. This has been fixed now.