they took them themselves seriously most of the time.
but, they still had continuity conflicts within tos to the point one wonders which
canon to follow on certain issues.

the line from return to tommow which makes the characters to have really bad amnesia considering both errand of mercy and wolf in the fold.
some other conflicts..
whether vulcan had been invaded in the past..
we know the stardates have to reflect some thing more then just time sequence due to the star dates for dagger of the mind taking place right in the middle of the star dates for miri.
dagger of the mind (2715.1 - 2715.3)
miri (2713.5 - 2717.3)
so much for being able to tell when something happened time wise just by stardate.
how the mind meld is viewed is another.
it goes from something so private vulcans dont speak abot it amongst themselves in dagger of the mind to something that spock does pretty willingly in later episodes.
but, they still had continuity conflicts within tos to the point one wonders which
canon to follow on certain issues.

the line from return to tommow which makes the characters to have really bad amnesia considering both errand of mercy and wolf in the fold.
some other conflicts..
whether vulcan had been invaded in the past..
we know the stardates have to reflect some thing more then just time sequence due to the star dates for dagger of the mind taking place right in the middle of the star dates for miri.
dagger of the mind (2715.1 - 2715.3)
miri (2713.5 - 2717.3)
so much for being able to tell when something happened time wise just by stardate.
how the mind meld is viewed is another.
it goes from something so private vulcans dont speak abot it amongst themselves in dagger of the mind to something that spock does pretty willingly in later episodes.