Challenge Accepted part of How I Met Your Mother Season 6 (2011 Television Episode)

Description

Robin and Barney meddle in Ted's relationship but things get more complicated when Barney sees Nora again. An incident makes Marshall and Lily think he could die of food poisoning. Ted pushes ahead with being best man at a very important wedding.

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How I Met Your Mother Season 6

#	Title	Air Date
How I Met Your Mother
6:1	Big Days	Sep 20, 2010
6:2	Cleaning House	Sep 27, 2010
6:3	Unfinished	Oct 4, 2010
6:4	Subway Wars	Oct 11, 2010
6:5	Architect of Destruction	Oct 18, 2010
6:6	Baby Talk	Oct 25, 2010
6:7	Canning Randy	Nov 1, 2010
6:8	Natural History	Nov 8, 2010
6:9	Glitter	Nov 15, 2010
6:10	Blitzgiving	Nov 22, 2010
6:11	The Mermaid Theory	Dec 6, 2010
6:12	False Positive	Dec 13, 2010
6:13	Bad News	Jan 3, 2011
6:14	Last Words	Jan 17, 2011
6:15	Oh Honey	Feb 7, 2011
6:16	Desperation Day	Feb 14, 2011
6:17	Garbage Island	Feb 21, 2011
6:18	A Change of Heart	Feb 28, 2011
6:19	Legendaddy	Mar 21, 2011
6:20	The Exploding Meatball Sub	Apr 11, 2011
6:21	Hopeless	Apr 18, 2011
6:22	The Perfect Cocktail	May 2, 2011
6:23	Landmarks	May 9, 2011
6:24	Challenge Accepted	May 16, 2011