Peanuts surges into the 1970s with Schulz at the peak of his powers and influence: a few jokes about Bob Dylan, Women’s Liberation and “Everything You Always Wanted to Know About Sex” aside, these two years are as timeless as Peanuts ever was. Sally Brown elbows her way to center stage, at least among the humans, and is thus the logical choice for cover girl . . . and in her honour, the introduction is provided by Broadway, television and film star Kristin Chenoweth, who first rose to Tony-winning fame with her scene-stealing performance as Sally in You’re a Good Man, Charlie Brown. Two long Summer-camp sequences involve Charlie Brown and Peppermint Patty, who has decided that Charlie Brown is madly in love with her, much to his clueless confusion. Snoopy shows up at camp as well, as does Peppermint Patty’s new permanent sidekick, the one and only Marcie. The eternally mutable Snoopy mostly shakes off his World War I Flying Ace identity and turns in