A birthday party for one of Lily’s co-workers leads to Robin connecting with a group of single partiers known as the “Woo Girls”. Ted presents a plan for Goliath National Bank’s new HQ.

While being evaluated by the I.O.A. Richard Woolsey meets a beautiful scientist new to Atlantis, who is not what she appears. Sheppard is captured and tortured by an enemy he thought was dead.

Earl remembers his first wedding anniversary and the events that finally lead to their break up, involving Earl’s cousin Blake and an invasion of killer bees.

Jane uses the murder investigation of a casino owner as an opportunity to win at the blackjack table.

When a strange parasite attaches itself to the internal organs of a dying FBI agent, Olivia suspects a connection to the Pattern; Peter and Walter tap into a dead man’s brain waves.

Sara is left with no choice but to take Michael to the hospital as his condtion rapidly worsens. Sucre and Lincoln are faced with unknown territory as they are left in charge of the operation. Elsewhere, agent Self makes a surprising ally.

Hiro attempts to delve into Arthur Petrelli’s past to uncover the mystery behind him creating a rival company Pinehearst and his hatred towards Angela. Sylar stricken by guilt tries to stop his murderous ways with HRG and Elle vying for his blood. Meredith’s training goes up in smoke with the arrival of her brother.

Barney creates a holiday to celebrate not being a father. Meanwhile, Lily and Marshall are considering having a baby, but Lily first wants advice from Ted and Robin.

The team fights to retake control of Atlantis when Michael infiltrates the control room to take Teyla’s child and destroy the city.

Suddenly at the top of Earl’s list a life-or-death item appears right after a new mysterious man moves in next door. Meanwhile, a science fair has Joy all worked up to the point of obsession. She’ so fixated on winning the fair so she can buy something special with the prize money.