Fergus manages to bring Boona back, but she remains prone and incapacitated. (I'll hold Boona's post #3990 until the top of the next round unless circumstances change.)
Striking at the cornered goblin, the goblin immediately reacts by raising a shimmering psionic shield of pure-thought-turned-force, and Fergus' blow is deflected.

Bryony: make that DC13 INT save. (On a fail, take 15 psychic damage and become incapacitated until the end of the goblin’s next turn. On a success, take half damage only.)

Jorzu creates a pretty good replica of Jurgen in the hallway. Jorzu senses that Laiti, still invisible, has returned nearby. ("'Command'? Really?")

Jurgen, Quinn, and Bryony (if not incapacitated or down) may act!

Jurgen, seeing his comrades down, fires 4 (2nd level Magic Missile)  17 Damage.

He moves 30' closer to the action.

Jurgen blasts a quartet of glowing darts at the last fighting goblin cornered on the far side of the mess hall. They all hit. It's in very bad shape but still fighting. Jurgen advances to just behind Bryony.

Quinn and Bryony (if not incapacitated or down) may act!

Int Save - 14! (with Bardic Inspiration)

The psychic blast overwhelms Bryony, and she clutches her head, wincing with pain. The pain is so all-consuming that she can do nothing else until it subsides. She doesn't even notice Boona crashing to the ground or Fergus healing her.

Bryony is just able to shrug off the effects of the psychic blast, but she winces in pain as the blast washes over her. 

Quinn climbs up atop one of the tables to get line of sight of the cornered goblin. Quinn glares at it and marks it as his prey. He grabs two darts and flings them at the goblin.

Bonus Action: Transfer Hunter's Mark to the goblin.

Attack 1: 24 to hit for 13 damage (6 + 3 colossus slayer + 4 Hunter's Mark)

Attack 2: 9 to hit (miss I'm assuming)

The last, panicked goblin goes down, Quinn's dart having found its mark. It is dead. (It had exactly 13hp left!)

The two surrendering goblins hold their hands over their heads. "Don't kill us! Who are you? What do you want?"

The frightened, singed badger bounds down the hallway, slamming wide open the door, already ajar, at the end.

Everyone may act!

Bryony notices the frightened badger and feels bad for it. She wants to go help it, but she doesn't know what might be on the other side of the door at the end of that hallway.

"We're from Phandalin," she tells the goblins. "You stole stones from some of the buildings. Why? What did you do with my family?"

Fergus:

“Well-said, Bryony,” adds Fergus,, offering “I will see what I can do about the badger while you guys restrain the surrendered goblins.”

Pulling out a bit of food, Fergus approaches the badger and says soothingly, “Calm down, noble beast.  You are not to blame here and no one wishes to harm you.”

Animal Friendship DC 15 Wisdom

Jorzu 

As Fergus heads towards the badger Jorzu shouts a warning; "Careful Fergus. Something scary in one of those rooms and someone sleeping in the other!" He then walks towards Hugo, muttering the word "snuffle" as he gets close. Hugo's giant form fades as mist swirls around it. When the green smoke disappears Jorzu's walking stick lays, inert, on the floor. Jorzu whips it up as he says; "Thank. You friend". He then walks towards the direction of Fergus.