Harmless Dilettante What I should have said was nothing.
Tremendously good framing concept for a TV show: 4400 abductees inexplicably displayed in time and place spontaneously return in a ball of light. Sadly, in four seasons, there was only one really outstanding episode: “Tiny Machines” in 2007. Great progression in which everyone gradually and compulsively gets sucked into building a mysterious machine.
Sadly, this series was a victim of generally lazy writing, often indifferent acting, and ultimately the Writer’s strike. A shame because there was just enough good plots and characters to make you really notice the missed opportunities for drama and conflict. Stole pretty liberally from The X-Files, but The 4400 did create a more coherent central mythology.