LOOK » “;Nova”; explores the idea that a Japanese midget submarine could have contributeed to sinking of the USS Arizona at Pearl Harbor, tonight at 8 on PBS.

LISTEN » Katherine McPhee's new album, “;Unbroken,”; out today.

DO » Free square dance lessons take place tonight and every Tuesday at 7 p.m. at Christ Lutheran Church, located at 95-1361 Meheula Parkway in Mililani. No partner necessary. For details, call 623-9229.