S.Holmes

Corrected entry: When hiding behind the rocks and looking at Mordor, Frodo and Sam are more than willing to make a run through the black gate behind the entering column of soldiers. How on earth might they get in unnoticed, even assuming they somehow would manage to make it as far as to the gate despite the guards (which simply must exist) watching above?

S.Holmes

Correction: That's part of the point of the scene - there IS virtually no hope, but they have to do something. In the book, Frodo puts it this way: 'I am commanded to go to the land of Mordor, and therefore I shall go. If there is only one way, then I must take it. What comes after must come after.' Until Gollum tells them otherwise, both hobbits only know of the one entrance.

STP