Bryan Cranston's casting as Walter White in Breaking Bad was far from assured. Vince Gilligan sought Cranston after working with him on The X-Files, but AMC was sceptical—his prominent role as the bumbling patriarch on family sitcom Malcolm in the Middle made executives doubt he could convincingly portray a ruthless drug dealer. The network pushed Gilligan to consider other candidates, including Matthew Broderick and John Cusack.

The breakthrough came when Malcolm in the Middle concluded in 2006 after seven seasons, opening Cranston's availability. With the Breaking Bad pilot scheduled for early 2007, the timing was critical; had the sitcom secured an eighth season, Cranston would have remained unavailable. Gilligan ultimately insisted on his choice, and Cranston later credited this support as essential to his career, stating he "needed a champion in my corner" to overcome the network's initial resistance.