Dave welcomes musician Justin Bieber and actor/comedian Michael Ian Black. Top Ten Summer Blockbuster Films About Presidents. Can the Biebs sing opera? Dave and Paul do their best to make Justin Bieber an opera star. Now that he's graduated from high school, will Justin Bieber be heading off to college? Justin Bieber shows Dave the new tattoo he got in honor of his new CD, "Believe." Justin Bieber talks about celebrating his 18th birthday. Plus: does this mean he'll get out and vote?

Episode info coming soon ..

After Charlie’s hand moved in the last episode, Alex has high hopes for his recovery, while she treats a patient who already has multiple surgeries under his belt. Meanwhile, Charlie coaches a young man killed in a roofing accident who has unfinished business with his severely injured brother.

As Hardman makes it clear he's back to stay, Jessica tasks Harvey with helping shore up support for her within the firm - but Harvey's penchant for winning may create more enemies than friends.

Officials delay Egypt's presidential election, penguins engage in erotic sex, Stephen sings to Sweden's Twitter executives, and Lawrence Krauss discusses the universe.

Episode info coming soon ..