Barney and Robin get ready to welcome their families when it’s time for their wedding weekend on “How I Met Your Mother” (CBS at 8), while Ted tries to complete his New York bucket list as he gets ready to move to Chicago.
A burned car reveals the remains of a dead gang member on “Bones” (Fox at 8), and a former FBI agent agrees to help with the investigation.
It’s Hollywood Night on “Dancing With the Stars” (ABC at 8), which brings all sorts of complicated performances, but it’s not at all fun when another couple is eliminated.
Caroline has her eye on a fancy pair of pants, and turns to the Internet to help raise money to buy them on “2 Broke Girls” (CBS at 8:30).
This week’s “Genealogy Roadshow” (WETA at 9, MPT at 10) is set in Detroit, as a woman learns about a secret her parents kept involving World War II.
Mom and daughter duo Christy and Bonnie don’t exactly get along on “Mom” (CBS at 9), but they’re forced to be nice when there’s a family crisis.
Isabella Rossellini guest stars on “The Blacklist” (NBC at 10) as the target of an assassin named “The Freelancer,” and Red promises he’ll help the CIA track him down before it’s too late.
On “Castle” (ABC at 10), a deadly toxin is released, and could kill thousands; after it affects Castle, who could die from the exposure, Beckett races to stop the disaster.
Ellen manages to stall killing the president during surgery on “Hostages” (CBS at 10), so a furious Duncan says he’s going to kill a member of her family as revenge.
Actor Sean Hayes and musical guest Sting are on “Late Show With David Letterman” (CBS at 11:35).
“The Tonight Show With Jay Leno” (NBC at 11:35) hosts former NBA star Magic Johnson, baker Marjorie Johnson and singer Gary Clark Jr.
— Emily Yahr