Two 'Heroes' exec producers leave show

Jesse Alexander, Jeph Loeb exit over creative differences

Two "Heroes" co-executive producers, Jesse Alexander and Jeph Loeb, have exited the show because of creative differences.

The move follows a slow ratings start to the third season, in which "Heroes" has posted several series lows.

Universal Media Studios-produced "Heroes" continues to be executive produced by creator Tim Kring and

Dennis Hammer, Allan Arkush and Greg Beeman.