During the Credits
There are no extras during the credits of The Lord of the Rings: The Two Towers.
After the Credits
There is no stinger after the credits of The Lord of the Rings: The Two Towers.
In the Extended Edition, the credits are longer because they include additional credits, the official LotR fan club credits and actors who appear in this version of the film. The fan club credits in TTT covers two and three-year charter members. Several cast members are also included in the fan club credits.