Batman and Robin ran out the door to find the Krynoid, having gotten bigger, thrashing its other tendrils at them. They got closer to the Krynoid as it was ready to open its maw, then stabbed their pyro-batarangs into the Krynoid. It roared in pain, then the batarangs fired their flame jets, forcing the Krynoid to release Ivy as it thrashed in pain. Everyone then left the cottage.
“THIS WAY!” called Ivy. She led the way to a gate that led outside the botanical gardens. Batman pressed a button on his gauntlet just as the sprinkler system kicked in. The Batmobile arrived and opened all its doors.
“Come on! To the Batcave!” called Batman. Everyone jumped into the Batmobile. The doors shut and Batman hit the gas. The Batmobile sped through the streets of Gotham as Batman pressed a few buttons on the console. “Oracle, connect me to Commissioner Gordon!” he said.
“Batman?! Thank goodness you’re alright!” sighed Oracle. “We lost radio contact the instant you went into the botanical gardens! Right then, Commissioner Gordon, you said? Just a sec!” The call then went through.
“Batman?!” asked Gordon once he accepted the call. “Isn’t this too early for you to call me?!”
“The situation’s bad, Commissioner,” replied Batman. “Ivy successfully cultivated the Krynoid! It’s taking over the botanical gardens!”
“Right then, we’ll set up a perimeter and monitor the situation.”
“Negative!” replied the Doctor. “You need to evacuate everyone within a mile of the botanical gardens!”
“Doctor?” asked Gordon. “What do you mean?”
“The Krynoid has the same telepathic connection to plants as Ivy does,” explained the Doctor. “It stabbed her in the back, so we’re temporary allies for now.”
“Ah, Mother Nature can’t handle an alien plant, huh?” asked Gordon.
“I heard that!” called Ivy.
“I was kind of hoping you would!” retorted Gordon.
“Is now really the time?!” argued William.
“William’s right,” said the Doctor. “By my reckoning, Gotham has about five hours before the Krynoid reaches primary germination.”
“What’s that supposed to mean?” asked Gordon.
“It’s gonna spread its seeds and make baby Krynoids,” explained Harley. Everyone looked at her, except Ivy. “…What?! I’m dating a plant lady! Don’t you think I’d learn some plant stuff?!”
“For once, Commissioner,” sighed Ivy, “I’m helping Batman make some weedkiller.”
“Meanwhile, Commissioner, you need to evacuate everyone within a mile of the botanical gardens,” said Batman. “Don’t take no for an answer, not even from the mayor.”
“Hold on, you’re asking me to boss the mayor around for his safety?” asked Gordon. He then chuckled. “Oh, my birthday came early! All right, Batman. Be safe. Gordon out.” The call ended just as the Batmobile entered the Batcave. Everyone jumped out and the Doctor led the way to the TARDIS.
“…Under normal circumstances,” purred Catwoman, “that would be nice and snug.”
“Not as snug as you think, Catwoman,” replied the Doctor. “Ivy, Batman, inside.”
“We can’t all fit in there!” protested Ivy.
“Oh yes, we can,” countered Batman as he and the Doctor pulled Ivy inside.
“WHAT THE-?!” yelped Ivy. The doors shut, leaving William, Catwoman, Robin, and Harley in the cave.
“…What are we gonna do to put the weedkiller in the Krynoid?” asked Harley.
“Ah, I had no idea we were entertaining a criminal and the woman beguiling Batman,” remarked a certain butler’s voice. Alfred had arrived.
“Hey, Alfie!” called Harley. “How’s the ol’ butler life?”
“I’ve asked you numerous times to refrain from calling that, Dr. Quinzel,” remarked Alfred. “Where, pray tell, is Batman?”
“In the TARDIS,” replied Robin. “He, the Doctor, and Poison Ivy are making an herbicide for the Krynoid.”
“…I’m rather surprised to hear that Dr. Isley, of all people, wishes to destroy a plant. I presume it betrayed her once it reached the adult stage?”
“You’re right on the money, Alfred,” confirmed William.
“How long have we got?”
“About five hours, according to the Doctor.”
“I see,” muttered Alfred grimly.
The Doctor administered what she and her team synthesized onto a slide with a Krynoid tissue sample. She then looked at the slide through a microscope. “…Aha!” she said. “Take a look.” Ivy looked into the microscope.
“…The cell walls are breaking down and spilling chloroplasts,” she said.
“With them outside the cells,” remarked Batman, “the plant would starve. And without the cell walls…”
“Vegetable soup,” summarized the Doctor. “But we’ll need to deploy a large amount of this stuff.”
“Batman, would the Batplane work?” asked Ivy.
“If the missile it’s carrying has a big enough payload,” replied Batman.
“We’ve only got four hours left,” said the Doctor. “You prep the Batplane, I’ll synthesize more.”
Making enough of the herbicide took three hours. The Doctor and William loaded the herbicide into a missile, then Batman and Robin loaded the missile onto the Batplane. Batman began the launch sequence as every cleared out of the launchpad. The Batplane then roared to life and flew out of the cave.
The Krynoid had gotten big enough to break through the upper windows of the botanical gardens. That was just what Batman needed for a sighting run. The Batplane’s computer then beeped. “Batman to Batcave, target locked,” he said.
“You’ve only got one shot, Batman!” reminded the Doctor. “It’s sure to defend itself!”
“I know the risks,” said Batman. Just then, giant trees grew. Batman dodged and aimed at the Krynoid. The computer beeped again, then Batman fired! The missile flew towards the Krynoid and struck true! More trees grew in retaliation, swinging their branches at the Batplane…then the Krynoid stumbled!
“…Weakness!” it cried. “WEAKNESS!” One of its tendrils then fell off!
“It’s working, Doctor!” called Batman. More of the Krynoid’s tendrils fell as the trees shriveled and died.
“Batman, Commissioner Gordon on the line for you!” called Oracle.
“Put him through!” replied Batman.
“Batman, what the hell was in that missile?!” called Gordon. “That monster’s coming apart at the seams!”
“Commissioner, I suggest you pull your men back!” replied Batman. “Because there’s going to be a terrible mess!”
On the ground, Gordon wasted no time. “You heard the man! Evacuate! Go! Go! Go!” He and his forces ran from the gardens as the Krynoid crashed all around them. The fall generated a lot of dust that obscured the whole thing. Everyone waited until the dust settled. Once it did, all that remained of the botanical gardens was a pool of green sludge and the smell of overcooked vegetables.
There were all sorts of press conferences from the mayor all the way down to Gordon telling the public about the events. In those conferences, they explained that the perpetrators, Poison Ivy and Harley Quinn, were arrested and thrown into Arkham. As Bruce, Damian, Catwoman now in her civilian identity of Selina Kyle, and Alfred were watching the conferences. “What rubbish!” grumbled Alfred. “Telling the public about alien plants! They’re quite clearly not ready!”
“I dunno,” remarked Bruce, “they already know about Superman and where he came from. …Speaking of aliens, Doctor, do you think we’ll see the Krynoid again?” The Doctor and William were idly standing by, enjoying tea.
“Mr. Wayne,” replied the Doctor, “I’ve gotten into contact with the Galactic Floral Society and Krynoids are still a tough subject to study. A lot of researchers still go missing.”
“Still, that herbicide should be given to the Justice League,” said William. “Maybe Superman’s fortress has something in its libraries about Krynoids.”
“I wouldn’t put it past Clark to have an entry on Krynoids,” muttered Selina.
“In any event, we have to go,” said the Doctor as she finished her tea.
“Already, Miss Doctor?” asked Alfred.
“Time waits for no Time Lord,” replied the Doctor. “William, how would you feel about taking a trip to Florana?”
“…Animal, vegetable, or mineral?” asked William.
“A planet-wide beach paradise,” explained the Doctor. “The bubbles in the sea are effervescent! You can’t sink in it, no matter how far out you are!”
“Fun in the sun, huh?” mused William. “…I could do with that! The plants there aren’t carnivorous, are they?”
“Nope! Strictly autotrophs!”
“Then what are we waiting for?!”
“Bruce? Any of your family want to come with us?”
“…I think I’m good,” replied Bruce.
“Same here,” agreed Selina. “I’ll keep to Earth, thank you.”
“And I’d rather not get lost in your TARDIS again,” supplied Damian.
“Alfred?” asked William.
“…I’d be delighted,” replied Alfred, “but, unfortunately, I already have a holiday booked. I’m aware your vehicle is time-travel capable, but I’d rather not run the risk.”
“All right then. Just thought we’d ask,” replied the Doctor. “Come along, William!”
The Doctor and William had changed for their new destination. “My first new planet!” said William as he packed the sunscreen.
“You’ll love Florana!” replied the Doctor as she checked her new swimsuit in the mirror. “Air like a magic potion! I feel centuries younger after a good holiday there!”
“Centuries?” asked William. “You Time Lords live that long?”
“Millenia, if we’re lucky!” The time rotor then stopped as the TARDIS made that familiar thud that indicated an arrival. “AHA! We’ve landed!” The Doctor dashed to the door! “Now, let’s-!” No sooner did she open the door than wind threw snow and cold air into the TARDIS. “GOOD GRIEF!” That was too cold, even for a Time Lord! She shut the door immediately.
“That didn’t sound like fun in the sun,” snarked William as the Doctor checked the console.
“That doesn’t make sense,” she muttered. “I know I set the controls for Florana! …Oh…Oh, very funny, dear!”
“Doctor?”
“The TARDIS brought us to Telos, an ice world. It’s her idea of being funny.”
“Oh, ha ha!” William said to the TARDIS console. It just beeped as if it were laughing.