The episode where he is in the coma is the season four finale 'The End in the Beginning'.
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It starts off as Bones and Booth are married. They own a nightclub called "The Lab". Someone gets killed in their comfort room. Bones and Booth sleep together around the time they find the body. Bones and Booth figured out who killed them and I distinctly remember them agreeing that they were happy they were not crime solvers. After, Bones tells Booth she's pregnant and all of a sudden the scene changes and the scene was a hospital room and Bones was reading her new novel. The episode ends as Bones telling him he was in a coma and Booth dramatically says "who are you?"
Hodgins and Angela get married in season 5 in the episode called the witch in the wardrobe.
Season 3, Episode 15, Pain in the Heart. On the episode before Pain in the Heart, called Wannabe in the Weeds, Fat Pam, a murder suspect, falls in love with Booth. While aiming at Bones with a gun, Booth jumps in the way and gets shot. On Pain in the Heart, it is his funeral.
He gets hurt
No...near the end of the season Booth confesses to Bones that he loves her, but she says she's too afraid of opening herself up to him, and they agree to just continue working together. End of the season they end up parting ways for a time.