EXCLUSIVE: I hear longtime John Wells Prods. executive Chris Selak is going to Lionsgate TV to take over the top development position vacated by Barbara Wall. Wall stepped down in May as EVP Television at Lionsgate where she served as head of development and current programming. (She is stay on as a producer until her contract expires in the fall.) Lionsgate brass did an extensive executive search before deciding to go with Selak. Selak most recently served as SVP at John Wells Prods. She previously worked at Mandalay TV.