<p>NEW YORK — The CBS comedy “Mom” signed off after eight seasons last week before 6.2 million viewers, the biggest audience of its final season.</p>
<p>The Chuck Lorre-produced comedy starring Allison Janney ended with her title character in an Alcoholics Anonymous meeting. Anna Farris, who was the series co-star for seven seasons playing Janney’s daughter but left for other projects after last year, did not make an appearance in the finale.</p>
<p>In the quick “vanity card” that appears with the final credits, Lorre wrote, “For 170 episodes, we wrapped jokes around hope … Thank you for your support.”</p>
<p>With another television season winding down, CBS was the most-watched network in prime time last week, averaging 5 million viewers. NBC had 3.7 million, ABC had 2.9 million, Fox had 2.3 million, Univision had 1.29 million, Telemundo had 1.27 million and Ion Television had 930,000.</p>
<p>Fox News Channel led the cable networks, averaging 2.29 million viewers in prime time. MSNBC had 1.44 million, HGTV had 1.19 million, CNN had 915,000 and TNT had 905,000.</p>
<p>ABC’s “World News Tonight” led the evening news ratings race with an average of 9 million viewers. NBC’s “Nightly News” had 7.6 million and the “CBS Evening News” had 5.6 million.</p>
<p>For the week, the 20 most-watched shows in prime time, their networks and viewerships:</p>
<p>1. “NCIS,” CBS, 8.94 million.</p>
<p>2. “60 Minutes,” CBS, 7.99 million.</p>
<p>3. “FBI,” CBS, 7.69 million</p>
<p>4. “The Equalizer,” CBS, 7.39 million.</p>
<p>5. “Young Sheldon,” CBS, 7.21 million.</p>
<p>6. “Chicago Fire,” NBC, 7.08 million.</p>
<p>7. “Blue Bloods” (Friday, 10 p.m.), CBS, 7.07 million.</p>
<p>8. “Chicago Med,” NBC, 7.06 million.</p>
<p>9. “Blue Bloods” (Friday, 8 p.m.), CBS, 6.36 million.</p>
<p>10. “Mom,” CBS, 6.17 million.</p>
<p>11. “American Idol,” ABC, 6.11 million.</p>
<p>12. “The Voice” (Monday), NBC, 6.03 million.</p>
<p>13. “Chicago PD,” NBC, 5.94 million.</p>
<p>14. “NCIS: Los Angeles,” CBS, 5.85 million.</p>
<p>15. “911,” Fox, 5.83 million.</p>
<p>16. “FBI: Most Wanted,” CBS, 5.79 million.</p>
<p>17. “The Voice” (Tuesday), NBC, 5.75 million.</p>
<p>18. “United States of Al,” CBS, 5.23 million.</p>
<p>19. “The Neighborhood,” CBS, 5.11 million.</p>
<p>20. “This is Us,” NBC, 5.08 million.</p>