OK, it my honest opinion, it is the best standalone series. But looking from a professional view, there are some flaws. Of course every season has their plot holes. But time travelling only causes more holes.Add the Power Rangers 'logic' in and its a pretty non-logical plot. However, plot holes are made up with good acting, darker tones, and real life themes in the mix. Emphasise on the acting since PR rarely have good acting. For those old-timers, you should know how dark In Space was(dark in PR standards). Even with the plot holes I mentioned, the story is good. Excellent I'm willing to say.By far the second best for me.Those who want to get a break from the cheesiness of the usual PR series, check out Power Rangers Time Force.