Kirk, Spock, Scotty, and Vivian all kept their hands on their phasers as they inched into the grand yet dark hallway of the castle. Bones's right knee was still in the brace, and his left arm was linked in his wife's, who was holding Bones's arm tightly, both to reassure him and to help him walk.

When they were all in, the door suddenly slammed shut behind them, making them all jump. Alarmed, Kirk tried the door. It was locked. Spock, Scotty, and Vivian joined their captain in trying to get the door open, but it wouldn't budge, not even with all four officers' strength.

"Great!" Vivian threw her arms up. "Now we're trapped in here."

"What?" gasped Tonia, putting her other hand on her husband's arm.

Getting an idea, Scotty took out his scanner and began scanning the hallway.

"Good thinking, Scotty," said Kirk. "You getting anything?"

"Nothing," replied Scotty.

"It was a good idea," said Vivian, who had her own scanner out. "But something is jamming mine."

Kirk and Spock looked at each other, both of them having had the same nasty thought. Kirk opened his communicator and spoke into it: "Kirk to Enterprise, come in, bridge."

Static.

"Mr Sulu?" Kirk tried. "Lieutenant Uhura?"

Static.

"I thought as much," said Spock. "The same thing that is blocking our scanners is also blocking the signal from our communicators."

"What?" snapped Bones. "So we're trapped in here and we have no way of contacting the Enterprise? What if something happens and we need to be beamed out?" He paused. "What if Tonia goes into labour?"

"Leonard, that probably won't happen," Tonia reassured him.

"But if you do and you need a C-section or something, what then?" Bones persisted.

"Leonard, calm down." Tonia stroked his arm. "The chances of that are low, so we'll just have to cross that bridge if we get to it."

Bones took a deep breath to calm himself. "You're right," he said. "As usual."

Suddenly, a booming voice came echoing through the castle, again making everyone jump: "Welcome to the castle of doom!"

Kirk, Spock, Scotty, and Vivian all held their phasers ready. Tonia and Bones held each other more tightly.

"Surviving will not be easy," continued the clearly-male voice. "How about we start by reducing the playing field?"

Before anybody could realise what the voice meant, trapdoors opened beneath the feet of two of the crew members. With a yell, Kirk and Vivian disappeared into the ground.

"Jim!"

Letting go of Tonia, Bones automatically made a painful move towards where Kirk had just been standing, and immediately an opaque wall grew up from the ground, splitting the four remaining crew members into two groups.

"Tonia!" yelled Bones, who was on the opposite side of the wall to his wife. He hit the wall with his fists as hard as he could, but he didn't even make a dent. "TONIA!"

"Leonard!" came Tonia's faint voice.

Bones pummelled the wall with all his strength until he felt a hand on his shoulder. He kept his fists on the wall and hung his head.

"Tonia…" he muttered.

"Doctor, you must remain calm," said Spock's unwavering voice.

"Jim and Vivian just disappeared into the ground, and now Tonia and Scotty are separated from us!" yelled Bones, angrily turning to look at the Vulcan. "Tonia could give birth any minute! And you're standing there all calm! Acting like nothing is happening, as usual!"

"Doctor, do not force me to use the Vulcan nerve pinch on you," Spock threatened.

Bones forced himself to calm down. He knew Spock was being serious when he threatened to Vulcan-nerve-pinch someone.

On the other side of the wall, Scotty was also hitting the blank material. He cursed. "No give!" he snapped. "No give at all!"

"It's a brick wall," Tonia wheezed. "What do you expect?"

Scotty didn't notice the undertone of pain in her voice.

"Mr Spock!" he yelled. "Doctor McCoy!"

"Scotty?" came Bones's distant voice.

"We're gonna have tae move away fer now," he called, stepping away from the wall. "There's nothin' we can do from here."

"Alright," came Bones's voice. "Look after Tonia, Scotty."

"Will do, Doc."

"Toni, I love you!" called Bones.

"I love you too, Leonard!" Tonia yelled back as loudly as she could manage.

Scotty turned to Tonia and gently took her hand. "Ye need help movin'?" he asked.

Tonia gave a weak smile. "I can walk, Scotty, but an escort would be nice."

Scotty offered the pregnant woman his arm. Tonia took it and was helped along the corridor. When they got to a T-junction, Scotty left Tonia's side and carefully checked both options.

"They don't look very different," said the Chief Engineer. "What do ye think, lassie?"

Tonia thought about this. "If they're not different, then let's just go right. What's the worst that could happen?"

"That's not a question ye want to be askin' in here, lassie," said Scotty with a grimace. "But right it is."