"Flight of the Conchords:" Jemaine's worst-case scenario

On Sunday's episode of "Flight of the Conchords," Jemaine (Jemaine Clement) wakes from an evening of drunken revelry to discover he has - gasp! - slept with an Australian woman. Which is anathema, of course, for New Zealanders, kind of like a New Yorker palling around with someone from Jersey, someone from Bel Air venturing into the Valley or anyone hanging out with a Kentuckian.

He calls Bret (Bret McKenzie) in a panic: "I went home with a woman. I think she might be Australian."

"You've got to get out of there," Bret, understanding his alarm, quickly advises.

From there, lots of Aussie jokes: "What did she sound like?" Jemaine's asked; he responds, "Like an evil version of our accent."

The woman in question boasts, "You couldn't get more Australian than me. My great-great grandpa was a rapist, and they shipped him out to Australia, where he met my great grandma, who was a prostitute. I say, 'met,' but he raped her."

But, hey, she's not bad-looking, so Jemaine weighs his shame against the notion of a too-rare booty call. He dabbles with a song: "Do Australians Feel Love?"

"Flight of the Conchords" has tried to up its production values this season while maintaining the show's low-rent deadpan sensibility, and so far, they've managed to balance the two pretty well. The music videos are more elaborate this year (in one on Sunday, Jemaine is haunted by the girlfriends of his past, which includes one with some suspicious facial hair), and the guest stars are name comics - Jim Gaffigan last week, Kristin Wiig next week.

But the show continues to revel hilariously in the Kiwi talent for officious inefficiency. Bret receives a handful of biscuits from New Zealand, while Jemaine doesn't because he didn't fill out the form properly.

- "Flight of the Conchords:" 10 p.m. Sunday, HBO.