This must be from 1968 or 1969: The cast of Petticoat Junction grace the cover of TV Guide. Note that June Lockhart is shown. Her character, Dr. Janet Craig, replaced Bea Benaderet's character, Kate Bradley, after Benaderet died in October 1968. Good rule of thumb: If the opening credits to Petticoat Junction come on and June Lockhart walks onto the porch of the Shady Rest, change the channel.