My special talent, if it can be thought of as one, and as long as no one else has it, is that I can remember pretty much any story, mainly of TV shows I've watched. Stargate SG1 for instance, in my head I have several overlapping graphs: Earths technology over time, the over arching story points of each season and the series at large, and where each episode falls on each season's general story arc.
The story arc graph I've noticed is actually something almost every TV series from that time did. Drop hints or reasons to go do things this season then have very little on those hints for 5-7 episodes, then something is found that leads to something major that re-exemplifies the hints/reasons from the beginning of the season and gives them an end goal.
This goal won't be pursued constantly, normally the next episode is a search that turns up nothing. Wait another 5-6 episodes and have a few mentions but never find much. Then find something big. Act on it. Have the finale where it's resolved then rinse and repeat until all Goa'uld have been eradicated from the galaxy and the Jafa are free.
Supernatural follows this guide to a T, with much of the later seasons main plot arcs happening around Sam and Dean who only manage to step in at the end once they find a place to stand and fight. It's part of what makes it a great show. Have a few episodes of the Winchesters tooning about vanquishing demons then they either get told or find the magic bullet, then it's right back to tooning about until the climax. If you have a weekly show you don't want to have all the plot in one episode, because if anyone misses it they won't be able to keep up with the story (except for the finale, go nuts there).
A show not following this (and I think suffering because of it (as well as a few other reasons (bad directing, poor story telling, hand holding the audience and telling them everything rather than believing the audience can follow their story and pick up on subtle things))) is Doctor Who, who's most recent seasons have increasingly been trying to appeal to a broader audience and reduce the barrier of entry (by blatantly stating absolutely every single character development and story beat (last season's inclusion on the short intro to each episode with Amy's voice explaining specifically who the Doctor is is an example of this)).
But now I'm just off topic, my point was I can tell you the plot of any episode of many good TV shows just from the episode title and the first few seconds. Neat huh?
P.S. You may think I'm abusing those brackets, but no, that's just how I roll
P.P.S. It's either nested brackets or nested footnotes, pick your poison