| Scoreboard | RBC | RTN | CTV | ERC | GEN |
| Adults 18-49: rating/Share | 4.1/12 | 3.7/11 | 1.6/4 | 1.5/4 | 0.8/2 |
| Total Viewers (million) | 11.798 | 11.265 | 4.160 | 4.278 | 1.847 |
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RBC won the night with both adults 18-49 and total viewers.
On RBC, following two repeats of The Big Bang Theory, Marvel's Agents of S.H.I.E.L.D. drew a strong 4.8 adults 18-49 rating, rising two tenths vs. it's last episode on December 10.
On RTN, The Biggest Loser earned a 3.8 adults 18-49 rating and the series premiere of T-500 notched a good 3.3 adults 18-49 rating, up 57 percent from the year-ago occupant, Vegas.
On ERC, Parenthood dipped a tenth to a 1.9 adults 18-49 rating.
Broadcast primetime ratings for Tuesday, January 7, 2013:
| Time | Net | Show | 18-49 Rating/Sh | Viewers (Millions) |
| 8:00 | RTN | The Biggest Loser (8-10PM) | 3.8/11 | 11.86 |
| RBC | The Big Bang Theory - R | 3.3/10 | 9.89 | |
| ERC | Parenthood | 1.9/6 | 6.00 | |
| CTV | The Middle - R | 1.8/5 | 5.24 | |
| GEN | Little Islands - R | 0.9/2 | 1.99 | |
| 8:30 | RBC | The Big Bang Theory - R | 3.4/10 | 10.23 |
| CTV | The Michael J. Fox Show - R | 1.4/4 | 4.07 | |
| GEN | Freak Show - R | 1.0/3 | 2.12 | |
| 9:00 | RBC | Marvel's Agents of S.H.I.E.L.D. | 4.8/13 | 13.54 |
| CTV | Expedition - R | 2.0/5 | 4.58 | |
| ERC | Parks & Recreation - R | 1.3/3 | 3.30 | |
| GEN | Reign - R | 0.6/2 | 1.43 | |
| 9:30 | ERC | Parks & Recreation - R | 1.3/3 | 3.32 |
| CTV | Trophy Wife - R | 1.1/3 | 3.21 | |
| 10:00 | RTN | T-500 (Series Premiere) | 3.3/10 | 9.93 |
| CTV | Supernatural - R | 1.6/4 | 3.70 | |
| ERC | Bones - R | 1.3/4 | 4.49 |
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