The 4th season has already been released on TV and on DVD.
It's just a guess but I think this November.
I dont know what season you are talking about but there will be a season 4
It has already begun.
24
Robin
How I Met Your Mother especially season 4, he loves "The Naked Man" episode
How I Met Your Mother's season 4 aired in the US on September 22, 2008 and ended on May 18, 2009. It started in the UK on December 10, 2008. It had 24 episodes
"Prophets" by A.C. Newman ;)
Watch Episode 12 Season 4 of how i met your mother it answers it.
No it wasnt on seson 6 seson 4
yes, robin even moves in with ted in season four
Its available now on DVD with seasons 1, 2 and 4.