A thief recently broke into Cranston's vehicle and took a bag containing the actor's iPad and a script full of plot details relating to his character, chemistry teacher-turned-drug lord Walter White.
Cops in Albuquerque, New Mexico, where the show is filmed, took Xavier MCAfee, 29, into custody over the weekend (23-24Mar13) on suspicion on being involved in the crime, and now Baker has spoken out in a bid to recover the missing papers and stop spoilers ruining the new series for fans.
He tells Tmz.com, "You (whoever has the script) have the choice to be a better person than that. You've already made a choice to steal from a person (Bryan Cranston) who is loved by millions of people... don't make it worse by betraying the rest of the cast and crew and fellow fans of the show."
The second half of Breaking Bad's much-anticipated season five is due to premiere in the U.S. this summer (13).