Tibalt Olyyant
Name Tibalt Olyyant
Date of Death 2008
Occupation Music teacher
Diagnosis Stem cell cancer
Actor Mark Beltzman
First Appearance Not Cancer
Tibalt Olyyant was the tuba teacher who collapsed and died in the montage at the beginning of the Season 5 episode Not Cancer. He was portrayed by actor Mark Beltzman.

While he plays the tuba, he starts coughing and coughs up blood, soon collapsing and quickly dying. 

An investigation shows that although his lungs were diseased, he did not receive a transplant that should have affected his lungs.

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