Fox’s Bones is ready to at long last introduce us to she who gave unto the world one Seeley Booth — and Joanna Cassidy will fill the pivotal role.

Cassidy, who also plays mom to Body of Proof‘s Megan Hunt, will first appear in an episode airing April 15, says TV Guide Magazine, which first reported the casting.

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Little is known about Booth’s momma, save for a crumb of an anecdote dropped here and there through the years. What we do know is that Booth’s grandfather Hank (played by Ralph Waite) raised him and his brother Jared after kicking their alcoholic, abusive father out of the house. (Edwin Booth was revealed to have died in Season 7, of liver failure.)

When I spoke with David Boreanaz last month about climbing this part of the family tree, he ventured, “I think the relationship just in general is better with his mother than it was with his father, so it’ll be something that we look at and try to figure out how we’re going to incorporate it into the storylines.”

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Cassidy’s other TV credits include HawthoRNe, Boston Legal, Six Feet Under, Buffalo Bill and Falcon Crest.

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