On TV: Unwritten Law, My Chemical Romance, Switchfoot

Rock acts on television this week include Unwritten Law, who perform on ‘The Tonight Show with Jay Leno’ on Tuesday; My Chemical Romance, who perform on ‘Jimmy Kimmel Live’ on Tuesday; Switchfoot, who perform on ‘The Late Show with David Letterman’ on Thursday; and Hellogoodbye, who perform on ‘The Late Late Show with Craig Ferguson’ on Friday.