SEASON PREMIERE: For the Season 4 premiere, the missing Frank (William H. Macy) returns to the fold. (He had to, or there’s no show, really.) But his return, predictably, is anything but smooth. Meanwhile, Fiona (Emmy Rossum) continues to experience a better quality of life, and work, while the other Gallaghers try their own hand at entrepreneurship – some in legal ventures, others less so.