TV Notebook: 12/14/09

The New Zealand folk-pop duo of Jemaine Clement and Bret McKenzie of the HBO comedy “Flight of the Conchords” announced that they will not renew the show for a third season.

No finales tonight, but two minor premieres: “The Sing-Off” on NBC at 8 p.m. and “Bank of Hollywood” on E! at 10.

CBS will test the waters of science fiction in a time travel project called “Murmurs.” CBS gave a script commitment to Jason Smilovic and producer Elaine Goldsmith-Thomas that revolves around a world where time travel is normal and an agency called Commission is in charge of it.