"How I Met Your Mother" season 9, episode 12 airs tonight - find out where to watch online a free live stream of "How I Met Your Mother" season 9, episode 12, titled "The Rehearsal Dinner."

If you can't make it to a TV by 8pm EST tonight to catch "How I Met Your Mother" season 9, episode 12, click here to watch "The Rehearsal Dinner" online via a free live stream.

If that doesn't work, CBS also offers episodes on their website to watch online the morning after an episode airs.

According to Hollywood Hills, the official synopsis for episode 12 reads: " Barney will get fixated on having the rehearsal dinner at a laser tag arena."

Another synopsis reveals: "Barney is going to become fixated on having his rehearsal dinner at a laser tag arena, much to Robin's dismay. In the meantime, Ted will not come through on a promise, which will aggravate Lily."

Fans of "HIMYM" will know Barney's obsession with laser tag, so while this may sound like the dream of an eight-year-old we are sure few are surprised by Barney's wishes. But we are surprised that Ted and Lily may be on the outs during this episode, after Ted does something to irritate our favorite redhead.

Hollywood Hills reports that a spoiler clip shows the "HIMYM" crew going over all of the (many) times Barney has come up with incredibly bad ideas throughout their friendship. The clip then reveals that there was once a time when Robin came up with the idea of getting married in Canada. But poor Robin is once again at the brunt of jokes about Canada.

Catch all the funniness tonight on episode 12 of "How I Met Your Mother" season 9, which airs Monday night, December 2nd at 8pm EST on CBS.