The two tribes finally merge into one.

Mike wants Phoebe to meet his parents, so takes her to dinner at their home. Phoebe is surprised to learn that his parents are quite rich and upper-class; she tries to make a good impression, but Mike's parents simply don't like her as much as Mike announces that he does. Ross discovers that Baby Got Back is the only song that will stop Emma's crying; Rachel doesn't want to believe that, but eventually, after trying everything else, she comes to the same conclusion.

When an expectant Jordan shows up unexpectedly, Dr. Cox is forced to choose between her and his new love, Julie.

Meanwhile, J.D. and Turk take advantage of the hospital's supply closet for sleep, when they take on extra shifts at a free clinic to supplement their income.

Carla encourages Elliot to stand up to her father, when he pressures her to pick a specialty more "suitable for a woman".

A boxing champ dies in the ring after taking a brutal beating from his nemesis, but Grissom finds evidence that points to murder. Outside, in a nearby parking lot, Catherine works a crime scene where a Los Angeles gang member was gunned down, apparently by a rival gang. Also, Nick investigates a jewelry-store robbery.

When Grace accompanies Leo to dinner with some 'friends,' she doesn't realize that he's tricked her and instead introduced her to his real parents -- and she soon regrets her earlier salty dialogue and suggestive attitude. Elsewhere, Jack is again confronted by Zandra -- his gruff acting teacher -- when he tries to showcase his meager talent in a class while a willing Will joins Karen in subjecting to a Botox facial injection.

Abby fears the worst when her brother Eric suddenly disappears. He is actually AWOL and she forges Carter's name to obtain his medical records. Carter and Chen treat a frightened Chinese immigrant nanny, Tong-Yi, whom they suspect was impregnated by her employer. Meanwhile, new surgical resident Paul Nathan, who is struggling to overcome a physical disability, tries to help in the emergency roombut his fellow doctors do not appreciate his advice to patients. Unable to quench his sexual appetites, Kovac also gets into trouble in his professional life, despite his admirable resolve to find an eye specialist to treat a young gunshot victim. Gallant and fellow medical student Erin Harkins engage in an escalating competition of medical knowledge. And Weaver gets some much-needed good news.

Jack and the team search for teenager William Hope, who goes missing in a very bad neighborhood after a confrontation with a local bully. Considered a good kid, William was living in a foster home after 18 months on the street and seemed destined for a better life when he disappeared. The squad discovers that his older brother Aaron, recently released from juvenile hall, visited William, despite the fact that his foster family forbade Aaron from being in their home. Jack and the others then learn that William was seen getting into a car with Aaron immediately prior to disappearing, and they fear that the good kid may have gone bad.

Tom Arnold

The #3 seeds, Firestorm is back and this year, Graham Bone and Hazel Haslop have a new robot, Firestorm 4. Can they win the UK championship this time?