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 Earth
The 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 chromakey "halo" is extremely prominent when Mike, Elizabeth and John are on the alien ship.
A Much-Needed Holiday
- Obvious backdrop is very obvious.
