Characters kiss. Some innuendo, E.G. Mr Smith ( a super computer from the show) types a message slowly and writes pen. A character says that "they've never been more happy to see a full stop."

A few explosions, and some aliens shooting at Sarah Jane and her gang.

Fights with sci-fi weaponary.

Some people get killed, but usually it is a near-death scenario rather than actual death.

"Hell" is sometimes used.

Some aliens are scary, particularly the Trickster.

Episodes which involve the trickster are usaully emotionally intense.