A cheerful series on ABC “Growing Pains” where Leo first appeared. Beyond that moment, viewers met someone who eventually charged into digital battles through game screens. The Seavers, brightening 1980s television in ways most shows never managed. Growing Pains climbed to fame quickly because its messy family life seemed oddly unique. Led by Alan Thicke and Joanna Kerns, the series changed direction at the beginning – Jason took charge at home …