Winkchen wrote:1. Maybe it`s very difficult to control something, I think they need something, that makes sure the person the are controlling isn`t doing anything against them..Or maybe there are just a few drak left and they`re are just something like to people who can control other persons..
It's definitely possible. Given how little information has been presented on the subject, I think all anyone can do is guess
2. I think nobody knows it. And does Sheridan see the keeper? I actually can`t recall.
I think he did. Londo leaned forward and we, the viewer, clearly saw it. Sheridan was in the same room, although it's possible he didn't see it, all the same. I mean, the camera angle and Sheridan's angle aren't exactly the same.
Is the thing that controlled Jack really a keeper? I think it was another species, because there was no trace of a drak..
Drakh might not need to be in close proximity for a Keeper to gain control of it's target. The Drakh had Londo give Sheridan and Delenn a Keeper for their sons 21st birthday. Presumably the plan wasn't contingent upon the Drakh being nearby.
The Drakh may have had other reasons for staying close to Londo, although now that you mention it, it seems like the Drakh could just have gone away after giving Londo a keeper.
Maybe the Drakh stayed nearby to give the Keeper updated instructions? Maybe with Jack and David Sheridan, they just figured that a general "directive" would be sufficient, whereas Londo would need to be given orders fairly frequently?