High Quality Content by WIKIPEDIA articles! "Of Course" is the seventeenth episode of the fifth season of the CBS situation comedy How I Met Your Mother and 105th episode overall. It originally aired on March 8, 2010. The New York Police Department's river patrol pulls Barney out of the Hudson River one night in March 2010. Upon being asked to explain by a police officer how he got there, Barney explains that the chain of events started one week before. He had picked up another woman at MacLaren's. However, she suddenly leaves him just when they were ready to return to his place. Meanwhile, Robin and Don, who have established good chemistry on their morning show, hang out with Marshall and Lily at the bar. Marshall encourages Robin to keep Don, to the point that he later pretends to be Robin accepting Don's invitation for a date. At Ted's apartment, Barney tells the gang about his failure to snag the woman. Ted claims that the woman may have read tips from a certain book called Of Course You're Still Single, Take a Look at Yourself, You Dumb Slut.