Blue Bloods, Defenders Blue Bloods, Defenders

Two of CBS' freshman series, Blue Bloods and The Defenders, are trading prime-time real estate next month.

CBS announced Tuesday that Blue Bloods will air Wednesdays at 10/9c for one month beginning Jan. 19. To make room, The Defenders will then permanently move to Fridays at 8/7c starting Feb. 4, two weeks after the series finale of Medium.

Watch full episodes of Blue Bloods

The swap makes sense for CBS. The network's five new shows are the top-rated new series of the TV season, and Blue Bloods has shown surprising strength on Fridays, where it is averaging 12.3 million viewers. As the lead-out to CBS' veteran hits Survivor and Criminal Minds, The Defenders' average of 10 million viewers is less impressive. Whether or not The Defenders will be a strong enough lead-in for  CSI: NY at 9/8c remains to be seen.

Following Blue Bloods' month-long trial, CBS will use the Wednesday timeslot to launch the spin-off Criminal Minds: Suspect Behavior, premiering Feb. 16. That move pairs the spinoff with the flagship series, which CBS did successfully with NCIS and NCIS: Los Angeles.

According to Deadline, the network has also reduced the first-season episode order for both The Defenders and $#*! My Dad Says, its two lowest-rated freshman series, in order to make room for its midseason series Criminal Minds: Suspect Behavior, Chaos and Mad Love.

Judy Greer has Mad Love for CBS pilot

$#*! My Dad Says will be replaced by Rules of Engagement, which moves into the post-The Big Bang Theory time period beginning Feb. 24. Taking the place of Rules is the new comedy Mad Love, which will air on Mondays at 8:30/7:30c after How I Met Your Mother starting Feb. 21.

The action drama Chaos will premiere on Friday, April 1 at 8/7c, following the season finale of The Defenders.

CBS orders Chaos

Here's the complete schedule:

Monday (beginning Feb. 21)
8-8:30 p.m. — How I Met Your Mother
8:30-9 p.m. — Mad Love
9-9:30 p.m. — Two and a Half Men
9:30-10 p.m. — Mike & Molly
10-11 p.m. — Hawaii Five-0

Wednesday
8-9 p.m. — Live to Dance (beginning Jan. 19) ... Survivor: Redemption Island (beginning Feb. 16)
9-10 p.m. — Criminal Minds
10-11 p.m. — Blue Bloods (beginning Jan. 19) ... Criminal Minds: Suspect Behavior (beginning Feb. 16)

Thursday
(beginning Feb. 24)
8-8:30 p.m. — The Big Bang Theory
8:30-9 p.m. — Rules of Engagement
9-10 p.m. — CSI
10-11 p.m. — The Mentalist

Friday
8-9 p.m. —  The Defenders (beginning Feb. 4) ... Chaos (beginning April 1)
9-11 p.m. — CSI:NY
10-11 p.m. — Blue Bloods (beginning Feb. 11)