The start of the level is far from being a picnic. The only means of getting through is to haul oneself up using a bed situated on the right of the partitions to where the plate-throwers are taking potshots at you. As soon as you're up, you need to get away fast, because a few hits will mean certain death. No other difficulties to point out here.
No change from the previous visit; you have to get to the top. There are a few shortcuts possible on account of Hyde's physical prowess.
No particular difficulties here. Kill the clown who rushes at you, and then speak to the guard (action button) at the end of the alleyway. Be warned: if you attempt to kill the guard, you are sure to die.
Take the staircase at the side of the counter and go up to the first floor to question the prostitute, who asks you to find her papers. Go back down, bump off Madame Yang's bodyguard and kill her in the same breath to stifle her cries of 'help'. Take the key from behind the counter and enter the room opposite this same counter (on the other side of the room).
Tread carefully, because a guard is sleeping nearby. Use the key to open the safe and take the papers from inside. Go back to see the prostitute, who shows her gratitude by telling you that the exit from the level is in the head of the dragon. There's one slight hitch: the jump required to reach the head is beyond Jekyll's capabilities. Go back down the stairs and climb the second floor on the other side of the room. Inside the accessible room (reddish-coloured lock) is a basin filled with water which, when mixed with the potion, will allow you to transform yourself into Hyde.