How I Met Your Mother: Every Season Finale Ranked Worst To Best

Season two of How I Met Your Mother is without question the most stable for the core gang. Marshall and Lily spend the season preparing their wedding, Barney's perfectly happy being Barney, and Ted and Robin enjoy a year as the gang's hot new couple.

But in Something Blue, cracks begin to form in the group's content lives again, as Ted and Robin are forced to reveal to Barney that they broke up weeks before the wedding because they wanted different things from their lives.

The reveal comes in clever, unpredictable stages - at one point, it even looks like the pairs' big secret is that Robin's pregnant, much to Barney's horror - and once the whole truth is out, it hits like a ton of bricks and sets up an uncertain future for everyone involved.

This particular heartbreak is balanced with an hilarious B-plot revolving around Marshall and Lily getting drunk at their wedding reception and revelling in their marriage. It's an episode that's both funny and bittersweet, and moves everyone's stories along brilliantly.