We all wanna know – WHO is The Mother aka Ted’s wife?

"Something New" -- Cobie Smulders stars as Robin Scherbatsky, on HOW I MET YOUR MOTHER, Monday, May 13 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Photo: Ron P. Jaffe/CBS é 2013 CBS Broadcasting, Inc. All Rights Reserved.

“Something New” — Cobie Smulders stars as Robin Scherbatsky, on HOW I MET YOUR MOTHER, Monday, May 13 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Photo: Ron P. Jaffe/CBS é 2013 CBS Broadcasting, Inc. All Rights Reserved.

We find out in How I Met Your Mother Season 8 Episode 24 “Something New.” It airs tonight, Monday, May 13 at 8 pm EST on the CBS Television Network. Don’t miss it! In the episode, it’s Barney and Robin’s wedding day. But will they actually get married? Will Robin find her missing locket? And why does Ted look like he’s having serious talks with Lily? Hmm…

How I Met Your Mother “Something New” Synopsis

As the gang prepares to head out to Robin and Barney’s wedding, Ted invites Lily to see the house he’s finally finished fixing up. Meanwhile, Robin and Barney’s night of relaxation is ruined by an obnoxious couple, and Marshall takes the baby on a last-minute trip to Minnesota to see his family, on the eighth season cliffhanger finale of HOW I MET YOUR MOTHER, Monday, May 13 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Casey Wilson and Keegan-Michael Key guest star as a couple having dinner at the same restaurant as Barney and Robin.

"Something New" -- As the gang prepares to head out to Robin and Barney’s wedding, Ted (Josh Radnor) invites Lily (Alyson Hannigan) to see the house he's finally finished fixing up, on the eighth season finale cliffhanger of HOW I MET YOUR MOTHER, Monday, May 13 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Photo: Ron P. Jaffe/CBS © 2013 CBS Broadcasting, Inc. All Rights Reserved.

“Something New” — As the gang prepares to head out to Robin and Barney’s wedding, Ted (Josh Radnor) invites Lily (Alyson Hannigan) to see the house he’s finally finished fixing up, on the eighth season finale cliffhanger of HOW I MET YOUR MOTHER, Monday, May 13 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Photo: Ron P. Jaffe/CBS © 2013 CBS Broadcasting, Inc. All Rights Reserved.

"Something New" -- Robin (Cobie Smulders, right) and Barney (Neil Patrick Harris, left) set off on their trip to Farhampton, the location of their wedding in the eighth season finale of HOW I MET YOUR MOTHER, Monday, May 13 (8:00-8:30 PM, ET/PT) on the CBS Television Network.  Photo: Ron P. Jaffe/CBS  © 2013 CBS Broadcasting, Inc. All Rights Reserved.

“Something New” — Robin (Cobie Smulders, right) and Barney (Neil Patrick Harris, left) set off on their trip to Farhampton, the location of their wedding in the eighth season finale of HOW I MET YOUR MOTHER, Monday, May 13 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Photo: Ron P. Jaffe/CBS © 2013 CBS Broadcasting, Inc. All Rights Reserved.

"Something New" -- Alyson Hannigan stars as Lily Aldrin, on HOW I MET YOUR MOTHER, Monday, May 13 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Photo: Ron P. Jaffe/CBS © 2013 CBS Broadcasting, Inc. All Rights Reserved.

“Something New” — Alyson Hannigan stars as Lily Aldrin, on HOW I MET YOUR MOTHER, Monday, May 13 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Photo: Ron P. Jaffe/CBS © 2013 CBS Broadcasting, Inc. All Rights Reserved.

"Something New" -- Josh Radnor stars as Ted Mosby, on HOW I MET YOUR MOTHER, Monday, May 13 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Photo: Ron P. Jaffe/CBS © 2013 CBS Broadcasting, Inc. All Rights Reserved.

“Something New” — Josh Radnor stars as Ted Mosby, on HOW I MET YOUR MOTHER, Monday, May 13 (8:00-8:30 PM, ET/PT) on the CBS Television Network. Photo: Ron P. Jaffe/CBS © 2013 CBS Broadcasting, Inc. All Rights Reserved.

Photos: Ron P. Jaffe/CBS © 2013 CBS Broadcasting, Inc. All Rights Reserved.