With “Unforgettable” as one of the classics performed, ABC’s Duets (1.0/3) went for the standards last night. That still left the singing series flat with last week and tied for a series low. Down 15% from last week, Wipeout (1.7/5) followed at 9 PM with a salute to the military. Rookie Blue (1.3/4) finished off the night up 18% from last week.