While each episode may showcase a certain story that is resolved by the end, the characters, their main stories, and their arcs continue on throughout each season. You have the options of hour long dramas or serials, hour long procedurals, half hour sitcoms, and in some cases, either limited series ( American Horror Story) or miniseries. With television, you're creating a world with a cast of characters that will hopefully continue on for upwards of 10-24 episodes (give or take) for multiple seasons, thus the main story will not be resolved by the end of each teleplay or television script. There's immediate closure, unless you're writing for a major studio franchise that can leave some story elements open to sequels.
Memento) - where we see a character thrust into a conflict, struggle through it, and then eventually succumb to it or work their way out of it. Such a story usually follows a basic three-act structure - or a variation of it (i.e. With film, you're generally telling a story that is contained within the time frame of ninety minutes to two hours plus.
What's the difference between a feature film script and a television script? Television is in a new golden era, and the formats of television are evolving.