These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
YMMV: The Tomorrow People
Had to have some fun with the Special Effect Failures here.
Special Effect Failure
The Slaves of Jedikiah
Kenny is obviously superimposed on Tower Bridge.
The Jaunting effect used in the first season involves FX patterns superimposed over the actors. This was too expensive, and too full of Fridge Logic, so it was dropped after the first season.
The stungun effect, first seen in this episode, shows an ellipse over the "stunned" actor. This one actually improves over a certain other show's habit of simply turning the film to negative, in that it allows for slightly better pacing.
When the ship explodes, it's an obvious model exploding.
The camera zooms in on the map that has had an optical effect circle drawn on it, causing the circle to be anchored in place on the screen as the map moves.
The Medusa Strain
Obvious superimposed square "light" when Jedikiah arrives on Rabowsky's ship.
Obvious chromakey effect during dinner between Rabowsky and Jedikiah.
When Peter freezes time, the scene in the Lab is shown by having the actors standing really really still, but Stephen and Carol's wandering through London is shown as though it were a weather presentation.
The Vanishing EarthThe Blue and The Green
Not a failure per se, but as mentioned earlier, the "jaunting" is now simply accomplished by a simple dissolve, which makes sense if you want to remain inconspicuous, but it's Hand Waved away as a method John discovered. So it makes no sense when Elizabeth's first jaunt is also lacking the flashy effects.
Into The Unknown
The Conspicuous CG - style chromakey "halo" is extremely prominent when Mike, Elizabeth and John are on the alien ship.
Ho Yay: The original series is quite blatantly one of the most homoerotic shows ever. The story The Doomsday Men features a group of athletic teenagers being trained to become a fascist military unit in Scotland. There are scenes showing them in kilts, stripped to the waist, and being menacingly caressed with a whip by their commanding officer as part of their "discipline". The later story A Much-Needed Holiday includes a gang of pretty young blond slave-boys being freed by the TPs. These lads are frequently seen in skimpy loin cloths and chains, and some fans of the show have re-titled this adventure "Planet Of The Buggery Boys".
The titular Tomorrow People are supposed to be a new stage in human evolution, a completely different species. They have senses and abilities today's humans don't, such as clairvoyance and telekinesis. It's hard to see how they could *not* be very different mentally — if nothing else, being able to teleport would give them a very different perspective on distance! There are hints set up early on of this, most notably that T Ps can't kill, even in self-defense. In the 90s remake, Adam has scars from a shark attacking him, and says he had a knife but "just couldn't bring myself to use it." But beyond never technically violating this one rule, the whole idea of mental diffences never really comes up again.
The main characters start out with different abilities. Kenny and Kevin are both sort of child prodigies. Carol has clairvoyance and precognition that the others never show. Megabyte has a lot of trouble even teleporting until his life is in danger. Yet in both versions of the series so far, their abilities are quickly homogenized, everyone able to do exactly the same things with exactly the same skill.
They Wasted a Perfectly Good Plot: The spaceship which the 90's Tomorrow People use as their base of operations and feel an unusual affinity towards, is never explored in-depth beyond the "Origin" episodes, and what's there is cryptic at best.