I have recently watched Prison Break and am now watching The Flash. A couple episodes into the series, an antagonist (Captain Cold) played by Wentworth Miller (Prison Break's Michael Scofield) shows up. Later in the show, Miller's character is being supported by another person, Heat Wave, played by Dominic Purcell, the actor impersonating Miller's brother in Prison Break.
Was the cast of these actors planned as an Easter Egg, or was it just the luck of the draw that exactly these two team up in The Flash?
Additionally, in another episode of The Flash, yet another known face from Prison Break, Robert Knepper shows up as Clock King.