FX's popular biker series returns for its fourth year for more motorcycle gunning, impressive facial hair and Katey Sagal just generally being awesome. Creator Kurt Sutter has promised an all-around stronger season than the scattershot Season 3 and certainly the plot descriptions and electic guest star line-up (including David Hasselhoff as a porn star) has us intrigued.

Tonight's two-hour premiere finds the members of Sam Crow -- including father and son Jax (Charlie Hunnam) and Clay (Ron Perlman) -- mending fences within the family, dealing with the ever-present threat of the po-po and contemplating business deals with some shady characters. We're anticipating an intense season powered by plenty of torque.

Sons of Anarchy airs tonight at 10pm on FX.