Harvey's presence on the show is sure to hold a ton of promise for Season 4, especially because it means that Claire officially has someone in her corner to help her get a leg up on her husband (which, spoiler, is going to be very important to Claire's #goals this season!).
Independent clauses can stand alone as sentences. To be independent, a clause must contain a verb and asubject and not begin with a subordinating word or phrase.
Dependent Clauses. Dependent Clauses cannot stand by themselves and make good sense. They must be combined with an independent clause so that they become part of a sentence that can stand by itself. (Review the section on Commas Usage for advice and plenty of exercises on the punctuation requirements when dependent and independent clauses are combined.)