Sunday’s prime-time broadcast ratings were a lopsided affair, with one network topping the combined total for all the other broadcast nets, based on Nielsen overnights for the key 18-49 demo.

TVbytheNumbers.com reports that Fox, which got a jump-start from the NFL playoffs, was the runaway ratings champ, averaging a 6.6 rating in the demo for prime time. The competition — NBC, ABC, CBS and Univision — averaged a combined 5.0.

The end of the NFC wild card game between the San Francisco 49ers and the Green Bay Packers helped get prime time off to a good start for Fox, which averaged a 13.3 rating in 18-49 for the 7 p.m. half-hour, when the game was still on, and a 12.1 from 7:30-8 p.m., with programming consisting of the tail end of the game and the wrap-up show, "The OT." It helped that the outcome of the game came down to the final play, with the 49ers winning it on a last-second field goal.

Leading out from football, Fox’s "The Simpsons" got a big bump, averaging a 5.2 in the 18-49 demo, up 49% from the previous original, which aired Dec. 15. The report notes that Fox’s lineup of animated shows all began 7 minutes late, and substantial adjustments can be expected.

Fox’s "Bob’s Burgers" turned in a 3.2 average in viewers 18-49, up 33% from the Dec. 15 installment; "Family Guy" held steady with a 3.0; and "American Dad" delivered a 2.5, up 4%.

Second-place NBC had a 1.3 in 18-49 for its two-hour "Dateline" and a 2.0 for the two-hour "Best of Late Night with Jimmy Fallon" prime-time special.

Third-place ABC actually had some good ratings news: a season high for "America’s Funniest Home Videos," with a 1.6 in adults 18-49; and a 13-week high for "Revenge," with a 1.8. The one-hour special "The Bachelor: Countdown to Juan Pablo" also scored a 1.8, while "Betrayal" settled for a 0.8.

The CBS lineup was down, including a season-low 1.2 average for "60 minutes" in viewers 18-49, down 43% from the previous original; a 1.4 for "The Good Wife," off 13%; and a 1.5 for "The Mentalist," down 17%. A repeat of "Elementary" delivered a 1.0.

For prime time overall, Fox’s 6.6 average in the 18-49 demo was the class of the field, followed by NBC (1.6 average), ABC (1.5), CBS (1.3) and Univision (0.6). Fox held a big advantage in total viewers as well, averaging 17.8 million to lead CBS (8.3 million), NBC (5.8 million), ABC (5.8 million) and Univision (1.9 million).

San Francisco 49ers QB Colin Kaepernick