Alexis Krause

Barney and Robin wake up in bed together and make a pact not to mention that they've had sex, Barney tries to find a loophole in the Bro Code to excuse his behaviour, and Robin feels guilty and tells Ted.

James and Zoe try radical treatments on a girl with a rare skin disorder in an attempt to heal her in time for her prom; James considers an experimental cure for Louis Keating's GSS condition; Malik is jealous of James and Zoe's special connection.

After a woman comes to Bunker Hill with a mysterious lung ailment, James ties other respiratory cases in her area to possible contamination from a microchip factory; a man struggles to walk despite his legs being in good condition.

James attempts a radical antiviral treatment on a young man ravaged by a drug-resistant strain of HIV; Walter attempts to treat a girl with a fatal flesh-eating bacteria; James makes a connection with Keating's nurse.

Angie tries to target her mother's illness using a radical technology; Walter, Malik and Zoe attempt to use suspended animation to stop a man's internal bleeding.

Talaikha and Malik treat a pop star for laryngeal cancer; Angie's mother reluctantly goes to see Scott as a patient when she thinks she might be ill and James suspects that Louis Keating's GSS is getting worse.