The former child actor who was the voice of Charlie Brown in the 1960s Peanuts animated television specials has been sentenced to a year in jail and immediately ordered to a residential drug treatment centre by a California judge who told him: “Don’t be a blockhead.” Peter Robbins, 56, who choked up while reading a letter of apology to the court, had pleaded guilty last month to two felony counts of stalking and making criminal threats against his girlfriend, Shawna Kern, and a plastic surgeon who had performed her breast implant surgery.