HBO has two comedies to make you squirm

Ricky Gervais (left) stars in Extras and Larry David returns for a new season of Curb Your Enthusiasm.

HBO has found the perfect companion for Larry David's Curb Your Enthusiasm, returning Sunday night for its fifth season. The new show, Extras, is the latest project of The Office's Ricky Gervais, another comic actor-writer who, like Mr. David, can't help but make his audience squirm.