An episode that's light on plot does some subtle characterwork and expands the scope of the show in useful ways.
A mini-crossover only reinforces this show's identity, and a great villain and well-plotted narrative makes this the best episode thus far.
Preview clip for the Flash episode titled Going Rogue
Screen captures from the extended promo trailer for the Flash episode Going Rogue
Preview trailer for the Flash episode Going Rogue
Photos from the Flash episode Going Rogue with Captain Cold and Felicity Smoak
Link to an interview with Grant Gustin of The CW's Flash
Screen captures from upcoming episodes of The CW's Flash television series
Promotional trailer for Flash Episode 2 The Fastest Man Alive and episodes beyond it
Video interview with Jesse L. Martin who plays Joe West on The Flash