I only saw a clip of the Walker, Texas Ranger fight so I don't know what happened in the episode. Just making stuff up.

THE PAST - THE LEGEND OF LORD CATERWAUL

Lord Caterwaul sat alone in his underground dojo, missing his four daughters. He had nothing else. Nothing but a monkey wearing a fez and a street organ. His phobia of statues prevented him from earning a living organ grinding though. He first encountered that legendary enemy that caused his fear of statues as a child. He'd taken a trip to Disney land as a child and one of those people who pretend to be statues had given him a wedgie when he wasn't looking. But he had done what he could for his daughters. He had found them as orphans on the streets of Madrid and taken them down into the sewers to teach them the ancient arts of Shaolin and organ grinding.

But now they were gone. It was only him and Mr. Snickers.

His name had not always been Lord Caterwaul. He was a disgrace. He had failed twice and now he was trying to reclaim his former glory through his children, like a child beauty pageant mother.

He was born Master Tatsu. Master was his first name, Tatsu his last. He had been Oroku Saki's general until he was wish-boned crunched in a nightclub by those four monstrosities that had robbed him of honor in front of his master and the world. And then Shredder had fired him. Cut off his dental plan and everything and he had needed a crown very badly.

So Master Tatsu fled to Texas and set up his own martial arts studio under an assumed name and eventually became an enemy of the most legendary character in all of martial arts. Chuck Norris. He and Norris fought in Tatsu's studio and Tatsu was again disgraced and this time in front of all his students. It had taken him long enough to gain their respect and it was gone with one cowboy kick to the head. But that was not the end of it.

He later challenged Norris to a fight to the death, but he didn't show up because his episode of "Walker, Texas Ranger" was over and his contract didn't include a fight to the death.

He changed his name again to a name he had fashioned that would frighten anyone who came within hearing distance. Lord Caterwaul. He wanted to use Lord Voldemort, but he'd heard that it was already taken by some other bad guy. He fled to Spain and joined the Order of Old World Shaolin.

But he needed to find his daughters. He packed up his street organ, monkey and a few other things and boarded a fishing boat that would take him to New York City, the scene of his first disgrace.

The three girls were thrilled to meet the turtles. They had never seen any men besides Lord Caterwaul and the four turtles were a great improvement over him, but that wasn't very hard considering what Lord Caterwaul looked like.

Leo nearly trampled Mikey as he pushed himself to the front and bowed at the girls. "I am Leonardo and the oldest of my brothers and also the oldest. I would like to welcome you to your new home." Then he remembered that he was supposed to be averse to outsiders and crossed his arms and said, "I can see that you three are unusually attractive females and seem to have an interest in us and I'm very sexually repressed, but I must do my duty as a ninja and the oldest of my brothers and protect them from happiness at all costs. So you'll have to leave. Except Maria Susana. She's the chosen one after all."

They weren't sure what she was chosen for, but it didn't really matter.

Macy pushed her sisters aside and said, "Well, I am the leader of my sisters and I say that it's too dangerous here."

Carly said, "I need some pizza like ASAP or my brain will fall out."

Mikey sighed. He never thought the day would come. He'd finally met an individual more obnoxious than himself. "Hey, dudette, we have some pizza." So he lit some candles and they had a romantic dinner and told each other suggestive knock-knock jokes by candlelight.

Don was afraid of girls. Either that or he was gay. He wasn't quite sure. He hid in the lab and watched them through a crack in the door. Raph had made it with his sai during one of his attempts on Leo's life.

Leo and Macy stared each other down.

Just as Leo and Macy were about to have a quadruple katana showdown, there was a knock at the door and in walked Lord Caterwaul. "I have come through the waters of the Atlantic and passed the many dangers there! I survived the kraken, Charybdis and the New York Coast Guard and now I have arrived! And it only took three hours."

Leo cried, "Tatsu! So we meet again!"

Then he killed him. Macy held Lord Caterwaul in her arms as he died. He removed his matador's jacket and spurs and handed them to Macy. "This is the symbol of our clan. Avenge me, daughter! But beware of the old enemy of our clan. You must kill these turtles and the other enemy I just spoke of, resume the organ grinding business and recover the sacred clothes. Oh, and you must fetch Mr. Snickers and the street organ from the cargo locker by 6pm or pay an extra fee." And then he died.

Macy then put on the matador's jacket and fixed to spurs to her espadrilles. Then she stared at Leo, with hate burning in her eyes. But she had to admit to herself, he certainly did look yummy, standing there all lean and intense and with his katanas dripping with her father's blood.

"I swear vengeance upon you, what's-your-name!" she said, pointing at Leo with her katana. "You will pay for killing my father!"

And then they made out madly, muttering about vengeance and honor killing when they came up for air.