Picture Tic Tac Toe.

Pic-Tac-Toe is a nine-picture grid puzzle where the three pictures in each row, vertical, horizontal, and diagonal, share a common theme. You figure out what they have in common! The middle square has to pertain to four different themes. Todd constructed one online; can you figure it out? Link to the puzzle. The answers are in this forum; you’ll have to highlight text to see the guesses. -via Ken Jennings