If you are writing a single storyline show, you need to hit the full 22 building blocks of every great script, just like a feature film. If you are writing a multi-storyline show, each line must hit the 7 major structure steps, with the A storyline getting the most detail.

Once you have a rough scene sequence (aka step outline), check the structure order as opposed to the event order. Ask yourself some crucial questions.

Key question 1: what is the order of what the hero is learning in the story?

This is the single most important determinant of whether your scenes are progressing properly. Add, remove or change scenes to get that sequence right.

Key question 2: Is there strong punch, counter-punch between hero and opponent?

This is one of the keys to a good second and third act. If there is no strong action-reaction between the two antagonists, or if one is way overweighted, the middle of your script will collapse.

Key question 3: Do you need to jam the story forward or push the story back?

Usually jamming it forward is best, because you get a faster start and more story density. But sometimes a story needs longer to develop to be realistic.

Generally, try to get texture in the first two acts and hold off the main revelations till acts 3 and 4