Ted is knocked over by a taxi after trying to break up with Stella. Meanwhile, Barney is knocked over by a bus going the wrong way and breaks all his bones in his body.
Ted stays up all night to work on a pitch to rescue his fledging business. Marshall coaxes Ted to go to the roof where he has laid on a surprise party.
London has a date who's very bright, so wears a radio receiver so that Maddie can send her intelligent things to say, but the scam is revealed and Maddy ends up with London's date.
A stampede at a comic book convention leads to an influx of colorful characters in the ER; Mark continues to make life difficult for Jackson.
While Sam answers a dangerous house call, love or at least sex is in the air at Oceanside Wellness as Pete and Addison decide to take their relationship to the next level.