Pardot directs the snake to return to him where it climbs up and wraps around his arm under his robe and joins the others to report what he found, as well as to see what they did. 

And so your snake returns, a writhing slimy bracelet along your arm. You make your way north to the torture chamber and join with the others. Any preparations you want to make while you are there, weapon/components?

I'll eagerly await everyone's plan from there :)

Realizing his very pretty white silk dress has no pockets, Ludolf frantically looks around the torture chamber for some sort of pouch and something to tie it around his waist with.

Investigation: 15

Before deciding what to do, Pardot lets the snake slither down from his arm into the door on the west of this room to see what's behind it ((perception 20))

Peering past the west door you see a corridor that is a mirror image of the east hallway. From here you see a closed cell door before the hallway bends out of sight. There are no guards.

No pouches or containers to be found. 

Seeing no guards, Pardot sends his snake through to confirm his suspicions that there are more cells this direction, as well as to see if there is anyone in them.

The snake slithers further down the hallway and confirms this hallway is a perfect mirror image of your cell block. Two doors along the right. The snake pokes it's head into the first door and immediately sees a very large, muscular man with long blonde hair. The man is standing at the door and calls out when the snake enters, "Trying to send your little minions in here to take me down!! Well Gunnar the Bold won't submit so easily!" He lifts a boot and slams his foot down at the snakes head.

Attack 21 Damage: 5

At this point Dandelion pokes her head back into the room, "Times up! Someone is coming!"

You have mere seconds to respond.

"Coming? From where?" Ludolf says quietly, but his eyes are fixed on the southern door and he tries to hide, tugging at Triäsa to follow him and do the same, ready to use his still available eldritch magic to spike the minds of any Yuan-ti assailing them.

Stealth: 12

Gasping as both his snake poofs out of existence and the cat warns of incoming danger, Pardot dives into the grate to hide. 

Triäsa notes Ludolf's urgency, but she heads for the grate, hoping Pardot allows her enough room to get inside and away from the entrance.  And to keep moving to allow room for others to come that way as well should they so choose.  (Stealth: 21)

As Ludolf notices Triäsa not following him and insetad move towards the chute he turns and instinctively follows her and Pardot, expecting everyone to exit through the chute instead.
"Hurry now, no time to lose." He says quietly, following close behind Triäsa.

One by one you climb into the steam vent including Cathbad (5) and Dandelion (12) You hear a knock on a door down the east hallway followed by "Prisoners, show yourselves to the door." this is followed by a short bit of silence then yelling in abyssal. 

Daventry you hiding in the vent also? Stealth check if so.

Daventry is the last one into the small passage, closing it behind her and silently watching, ready to spring out if required...

Stealth: 25

One by one you each hide in the steam tunnel. The heat is intense but bearable. The yelling abyssal echo down the eastern hall and shortly after you hear taps of the lizardfolk's feet moving closer to your position. There is more yelling in their foreign tongue and you hear two sets of footsteps one coming toward your room and another going the other direction.

It's not long after that one of the lizardfolk enters the torture room. You hear hissing and abyssal uttered with disdain as the creature tries frantically to locate your position. Like the well trained lizard they are it raises it's serpentine nose to the air and it's tongue flicks wildly at the air trying to taste your smell.

Perception: 13

(This will be the DC for your group stealth check)

The creature pauses for just a moment, and it glances briefly in your direction... Your heart pounds certain you've been discovered but then the creature relaxes and as it storms out the room through the west door. 

Again, you hear two voices arguing in abyssal. This is accompanied by the deep booming voice Pardot heard earlier, "HAHA! Escape did they! Well, you wait till I get out of here. I won't go so quietly; Gunnar the Bold will rip the head right off your vile throats!" The man seems to almost laugh as he taunts your captors. He is very very loud.

"Do we think the adjacent room is empty now?" Triäsa asks the others. "Perhaps we could rapidly get in, check of our gear is there, and get out? Or do we just follow this thing?" 

"Seems like they are both to the West." Dandelion purrs in a quiet tone to Triäsa . "No telling if others slither the halls nearby."

Cathbad whispers in reply, "I'd know that voice anywhere. Gunnar is the leader of our merry band. He is a mighty but brass paladin. He would be a valued ally in our escape... He is not... subtle..."

I think it is fair you would have the following insight into positions and map. I only put Dandelion on the map to rep your party. 

"I would prefer us being subtle, but it feels wrong not bringing Gunnar with us." Ludolf says quietly, looking at the others in the team. "Maybe wait until it seems the creatures move on and then go and release him, hoping we can fight our way out if necesary?"

"I'm not leaving anyone to be tortured. I've an idea. I'll cause a distraction in the torture room, lead them on a chase. Ludolf, you run past and get to Gunnar, get the bar off his door. I bet he'd love to clobber some lizard folk with a timber..."

Daventry glances to Pardot and Triäsa. "When they get to me, you two pop out and drop one of 'em from behind. Let's soften them up with your star bolts, then hit them with a sleep spell. They don't want us dead, remember?"

The time for action being now, Daventry slips back up into the torture room, and rushes her 30 feet towards the door. She then shouts, "Hey, lizard boys! We were looking for you!"

And she readies her whip to attack...

Dauntless Daventry darts across the room in her dashing white dress and yells to the lizardfolk. Immediately they turn toward her and hiss, "There get her!" The creatures draw small daggers from their waist as they spin back toward the torture chamber!

Initiative!

• Serpent Guard 1 21
• Serpent Guard 2 6
• Daventry 7
• Ludolf 15
• Pardot 24
• Triäsa 21
• Dandelion 8
• Gunnar 4
• Cathbad 7

Map with everyone (and coordinates!)