Jack is actually a Time Agent - part of a kind of space CIA - and he's trying to find two
years of his memory that have disappeared. He's a rogue Time Agent and he knows he's done
something in his past and he's not sure what it is or whether it is good or bad because
his memory has been erased. He's also an intergalactic conman and he starts off by trying
to con The Doctor and Rose. He tries to sell them something in order to get money because
that's what he does. He has conned a lot of people in the past. His method is to sell people
things that are not what he says they are - and then once he has got the money he runs.
Jack is actually a Time Agent - part of a kind of space CIA - and he's trying to find two
years of his memory that have disappeared. He's a rogue Time Agent and he knows he's done
something in his past and he's not sure what it is or whether it is good or bad because
his memory has been erased. He's also an intergalactic conman and he starts off by trying
to con The Doctor and Rose. He tries to sell them something in order to get money because
that's what he does. He has conned a lot of people in the past. His method is to sell people
things that are not what he says they are - and then once he has got the money he runs.