'All Dogs Go To Heaven' was seen by just 2.08m at 9pm on The CW.
Prior to that, the latest Smallville episode saw its audience increase to 2.89m, from 2.61m last week.
Over on Fox, a House rerun logged 3.3m, then The Good Guys took 2.39m in the 9pm hour.
CBS secured 6.92m, 9.98m and 10.53m for its respective showings of Medium, CSI: NY and Blue Bloods, while School Pride and Dateline had 2.4m and 5.86m for NBC.
Elsewhere, Supernanny grabbed 5.31m for ABC in the 8pm hour, after which Primetime picked up 6.3m, and 20/20 fetched 4.42m at 10pm.