Complex sentence: Peter Derns (Timothy Hutton), is an executive for a cookie company, called Mrs. Appleby's Cookies, who has just been released from a clinic after being treated for paranoia and he is still in a shaky emotional state.
Split into simpler sentences: Peter Derns (Timothy Hutton) is an executive for a cookie company. He has just been released from a clinic after being treated for paranoia and he is still in a shaky emotional state.