And now for the epic conclusion!

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“Sorceress Supreme”
“I’ve had enough of that ‘Mordo’ guy!”
Yes, and so did Sarah. Trapped in the Dark Dimension! It was the last place
any Master of the Mystic Arts wished to be!
Meanwhile, Doctor Strange found himself leading a charge into Jareth’s castle with one member of his party missing. No, make that
two members. “Where’s Hogbreath?” he asked in an ill-mannered reference to Hoggle, who was oddly nowhere to be found. Strange was quick to make a hasty conclusion: “He probably ran away – the coward. No matter. We can still do this with just the four of us.”
“Right you are, sir!” Sir Didymus daringly concurred.
“Sir Didymus, you and Ludo go and find Sarah,” Strange commanded.
“But I thought the fair maiden sorceress fell through that portal,” Sir Didymus recollected. “You expect us to follow after her the same way?”
“PORTAL…BAD!” Ludo roared.
At first, Strange did not understand their confusion, but he immediately clarified his command. “No, no. Go and find the
other Sarah.”
“There are two?” Sir Didymus remarked, even more puzzled now.
“Yes, there’s one much younger than the other,” Strange told him. “She’s with a man in a bowtie who calls himself ‘Doctor’. They should be somewhere in this castle, possibly held captive in a dungeon.”
“I see,” Sir Didymus finally comprehended. “And what shall
you be doing while we are on this task, brave sir?”
“I’m going to find Jareth…and kick the crap out of him,” Strange declared.
So, the three heroes split up – Strange to confront Jareth and Sir Didymus (riding on Ambrosius) and Ludo to wander the halls of the castle endlessly, seeing that it was more of a labyrinth than the one outside, until they quite literally bumped into the very people they were searching for: the Doctor, the young Sarah, and Toby.
“It is you – the
young fair maiden sorceress!” Sir Didymus exclaimed.
“What?” Sarah reacted bafflingly to his perception of her. She eyed the two strange characters, who she met under different circumstances in another timeline. The big, furry horned one terrified her at first, but then she saw the sweet gentleness of his eyes. And the fox-terrier wearing an eyepatch and riding a sheepdog that closely resembled Sarah’s own dog, Merlin – she found
him quite dashing. “Who are you two?”
“We have come to free you,” Sir Didymus told her.
“A bit late for that,” the Doctor uttered. “But you
can help us get out of here.”
Of course, the Doctor was most of the help. They followed his sonic screwdriver, which was connected to his TARDIS, which was held in the throne room…where they also found a certain sneaky dwarf.
“Hogwart!” Sarah called to him.
“It’s
Hoggle!” he grumbled. “You said it right earlier!”
“Did I?” Sarah had no remembrance of that moment, mostly because it was not
this Sarah who was involved in it. And Hoggle came to the same conclusion upon closer examination of this Sarah in front of him. She was young and fresh-faced, not the old and wise woman he abandoned near the castle entrance.
“You abandoned us near the castle entrance!” Sir Didymus accused.
“I was hoping to use
this thing…” Hoggle motioned to the Doctor’s TARDIS. “…to save the older Sarah! He’s got her trapped and it’s all my fault!”
“Who’s got her trapped?” the young Sarah asked. “Jareth?”
“No, not Jareth,” Hoggle said. “Mordo!”
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In the Dark Dimension, the confrontation between Sarah and Mordo commenced.
“I’m going to leave you powerless here,” he threatened her. “You’ll no longer be a threat to our world.”
“That’s not gonna happen, Karl!” Sarah vowed.
She once again engaged in mystical combat with Mordo. Their battle much fiercer than their contest in Central Park. The only difference being that Sarah’s power was much stronger, overwhelming Mordo.
“It’s because they’re in the Dark Dimension, isn’t it?”
Indeed, it is.
“Ha, ha! Ol’ Mordo didn’t see that coming!”
It was a tactical error on his part and a monumental advantage on Sarah’s. She overpowered him with the utmost ease, rendering him to an exhausted state on the ground and stealing his Sling Ring from him.
“You are just like Kaecilius! You will kill us all!” the fearful Mordo decreed.
For a moment, Sarah considered leaving Mordo trapped in the Dark Dimension for all of what he had done to her – tampering with her past, endangering her future, and (worst of all) hurting her friends.
“And did she?”
No, she didn’t. She tossed his Sling Ring back and told him, “My purity is my strength.” She then returned back to Jareth’s labyrinth, leaving Mordo defeated and finished…for now.
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Back in Jareth’s castle, Strange’s battle with Jareth was more of a contest of wit than that of magic. Both men managed to outsmart the other, using the contorted structure of the castle to their benefit. It was only when Jareth once again manipulated the reality around them to catch Strange off guard.
“Too weak to fight me without cheating, Jerry?” Strange taunted.
“This isn’t cheating, Strange,” Jareth said. “This is merely raising the stakes.”
Amid their contest, the Doctor’s TARDIS materialized within the shifting space. The Time Lord – with the young Sarah, Hoggle, Sir Didymus, Ludo, and Toby in tow – attempted to assist Strange, only for Jareth to manipulate the space around the ship to make it impossible for them to get to Strange and vice versa.
But just when it seemed as if this madness Jareth created would make him the victor, the elder Sarah arrived and amplified the power of her Sling Ring to bring Jareth’s castle
and his labyrinth out of the mirror dimension.
Seeing how much more powerful she had become than even himself, Jareth pleaded to her, “Take me up on the offer I gave to your younger counterpart. Stay with me in the labyrinth as my queen.”
Sarah smirked at her old adversary, who she had now surpassed in power.
“No, Jareth,” she refused. “My purity is my strength, not the darkness within me.”
And on this, Jareth the Goblin King relented and permitted Sarah and the others to leave from his labyrinth, but not without one final warning: “As long as our worlds remain entwined, I will always be watching you.”
“So will I,” Sarah deflected.
Returning back to 1986 in the Doctor’s TARDIS, the young Sarah was glad to have been back home, along with her baby brother. But she lamented of the adventure she left behind in the labyrinth, “It was never a proper adventure for me…not like the one you had before it all changed.” She gestured to her elder counterpart.
“Don’t worry about that, honey,” the elder Sarah told her. “Hoggle, Ludo, and Sir Didymus will always be there for you when you need them.”
The young Sarah left overjoyed by this assurance.
Alone with only her and the Doctor, Strange addressed Sarah on her brief time in the Dark Dimension. “Did you ever see the face of the guy who’d been tormenting you?”
Sarah wasn’t sure he was ready to know the truth about Mordo yet.
“No,” she fibbed. “I never caught his identity.”
Accepting her answer, Strange went on to another matter: “I’m confident you can control the connection you have to the Dark Dimension. The Ancient One did so before you. Shortly before she died, she told me, ‘Sometimes one must break the rules in order to serve the greater good.’”
Sarah scoffed and whispered to herself, “I wish Mordo saw it that way.”
“What did you say?”
“Nothing.”
“So what did become of Mordo?”
That is a story that
isn’t mine to tell.