How I Met Your Mother 8 p.m., Channel 4

Last week, CBS announced that this sitcom will be back for a ninth and final season. At least the end — and the mother — are in sight, although I’d be happier saying goodbye and getting the solution to the mystery this May. At this point, I greet the teases for the mother with a shrug. Still, there are pleasures to be had, since the characters have remained extremely likable. Monday’s episode is another Robin Sparkles extravaganza, when Barney discovers a lost episode of a music show about the Canadian pop singing sensation. Pictured:
Cobie Smulders as Robin.

Girls 9 p.m., HBO2

This episode, called “It’s a Shame About Ray,” proves that the show can function as a drama. It revolves around a dinner party where the gang let their angry freak flags fly. I love it. Also, there are excruciating scenes of Jessa meeting Thomas-John’s parents. Chris O’Dowd, as Thomas-John, has been a great addition to the series, by the way. Can’t wait to see him in Christopher Guest’s upcoming HBO sitcom, “Family Tree,” due this spring.

The Carrie Diaries 8 p.m., Channel 56

Dorrit’s not so little anymore.

Deception 10 p.m., Channel 7

Blah blah blah Vivian’s still dead.

Cake Boss 10 p.m., TLC

A dog wedding. Serve only when guests sitting.