The Flash: Flash Back

SYNOPSIS

Having discovered the truth about Zoom's true identity, Barry is more determined than ever to return to Earth-2 and stop his nemesis for good. First, he decides he must find a way to make himself even faster, and travels back through time as part of a clever ruse to trick Dr Harrison Wells - AKA Eobard Thawne - into teaching him how to increase his speed. However, he soon finds himself face-to-face with an old foe - Hartley Rathaway. Superhero action adventure, starring Grant Gustin.