The character creation rules are suited to companions and normal heroes. Players may find it tricky to create a character as experienced or as powerful as River Song or Captain Jack Harkness. This trait provides the character with additional Character Points and Skill Points, at the cost of Story Points. This reduction in Story Points not only applies at character creation, it also reduces the number of Story Points the character can carry over between adventures.
Experienced reduces the maximum Story Point pool for the character by 3 and provides the character with an additional 2 Character Points and 2 Skill Points. This trait can be purchased additional times, though no character can be reduced to zero Story Points because of this. That’s far too dangerous! Not every character should be as experienced as this, and their lower Story Points help to balance the character with their less experienced companions.