Next Monday on Bones, Booth (David Boreanaz) gets the mother of all surprises when he finds an unexpected guest waiting for him in his office: His estranged mom, Marianne (played by Joanna Cassidy)!

As you can see in this exclusive video sneak peek, the initial reunion starts off awkwardly — um, they haven’t seen each other in a quarter of a century! — but ends in a mostly feel-good place.

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Make no mistake though — unresolved issues remain.

“There’s a lot of history there and a lot of things unspoken,” previews executive producer Stephen Nathan. “And a lot of things [they] are going to try to repress and sweep under the carpet, but they won’t be able to.”

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Press PLAY below and then hit the comments with your thoughts on the mother-son reunion 24 years in the making. Bonus: Scroll down past the video player for additional images from the episode.