But in terms of the consistency of the series, from episode to episode?
Consistency is not a criterion I place much value on in entertainment or art. I value it more where fast food is concerned - McDonalds is mediocre but edible and entirely reliable from town to town, state to state.
Trek TOS has stories like "The City On The Edge Of Forever," Twilight Zone
has stories like "It's A Good Life" - and they only have to ring that bell a couple of times before all of modern Trek, Straczynski, etc. are out of competition notwithstanding the fact that I might know that in week 5 of season three of B5 I was going to get pretty much the same thing I got in week 4.