 The executive producers were creator Shonda Rhimes, Betsy Beers, Mark Gordon, Krista Vernoff, Rob Corn, Mark Wilding, Joan Rater, and James D. Parriott.The regular directors were Rob Corn, Eric Stoltz, and Tom Verica.The fifth season had thirteen roles receiving star billing, with twelve of them returning from the previous season, out of which eight are part of the original cast from the first season.