Robert Smythe is a ruthless executive with a dangerous twenty year old secret. An echo from the past prompts him into a new cover up of the truth, but his wife becomes suspicious.
Danny and his family are chosen to make a promo to boost ratings at the TV station.
Christopher and Bobby are worried about his adoption but each of them for very different reasons. Ray punishes Charlie's boyfriend. Cliff's natural gas operation ends up hitting a snag. Sue Ellen attempts to make J.R. jealous.
Ioki faces being dismissed from the force when internal affairs discovers that he is a Vietnamese refuge who is using an alias. Flashback sequences show his escape from Saigon.
As Shredder lures Splinter into he Technodrome, this time with the promise that a weapon in his possession can restore the sensei to human form, the Turtles confront a giant-sized Krang, now in a new body, in the heart of New York City.
Laura, a deaf-mute tunnel dweller, witnesses the murder of a police officer, for which another man is framed.
After discovering that Maggie has finally accepted Richard, Emma and Angela throw a surprise engagement party. During the party, Melissa makes her entrance dressed only in a bathrobe. Lance discovers that the charming stranger he has befriended knows secrets that could directly impact him. Liz makes an announcement that infuriates Angela but delights Maggie. Melissa overhears Angela talking about her plan to drive Melissa insane and have her committed. Richard saves Eric from making a terrible mistake.
Shredder experiments with the Inter-Dimensional Portal, hoping to contact Krangs' Rock Soldiers and prepare an invasion of Earth, but a group of fun-loving aliens called the Neutrionos, renegades in Krang's dimension, take advantage of the Portal's opening and use it to arrive on Earth.
Two sappers make their way into Firebase Ladybird without being detected, but Percell sees the third one, killing him. The other two manage to set off their explosives before they can be stopped. The next morning, Capt. Wallace orders Anderson and Goldman to have their men police up the dead bodies.. Anderson complains his men are beat, but Wallace isn't concerned. Percell is upset both over a friend's dying and having received a ""Dear John"" letter. Goldman, meantime, runs into an old friend: Lt. Nikki Raines, and promises to meet her later. Goldman, Anderson and the squad go out to destroy a bridge, which they blow up. Percell, in the midst of chasing a running VC, accidentally kills an 8-year-old. Percell is devistated over the incident.
Christmas Eve is depressing at Cheers as Sam rushes to find Rebecca a gift, Rebecca makes everyone work late, and Norm's Santa Claus buddies gather to celebrate the end of the season.
Vaudeville is shown to Rudy and her friends, who are unimpressed.
Whitley's secret Santa surprises her with a visit from her newly separated daddy, who walks in with his youthful girlfriend.
Rick gets a telephone call from a girl who is inspired by his book and does some detective work herself, only to be arrested. Her eagerness equals trouble to have around, but it turns out she's right, and the Simons wish they'd taken her hunch more serious a lot earlier.
A blizzard traps everyone inside the courthouse and cancels holiday plans, including a visit from Bull's mother, the skipper of a garbage scow.
McCall asks Harley to help him handle a request for help from a six-year-old AIDS victim who is living with his grandmother and facing increasingly violent harassment from the frightened and angry neighbors.
Baxter Stockman, a mad scientist, is showing an exterminator his new invention: a rat catching robot called Mousers.
While plans are in full swing for the Keaton's 20th anniversary party, Steven and Elyse are fighting and it looks like they may not make it that far. Elyse wants to have a big party to celebrate the Keaton's 20th anniversary and Steven reluctantly agrees. Steven's enthusiasm for the affair diminishes even further as Elyse's guest list expands and the domestic problems begin to stack up, the happy couple are at each other's throats... until the kids decide they'd better do something if they want their parents to stay together.