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- For other uses, see Gregory.
- See Tree for other articles with titles that contain, either by relationship or by coincidence, this character's surname.
Commodore Tree was responsible for logging the report of the USS Wells, a Federation starship that departed the base on a three-year mission, inexplicably time travelled and returned in only 33 solar days. (TOS reference: Spaceflight Chronology)
|Starbase 20 personnel|
|C'Raal • E. Banner • L. Bywall • G. Genqona • E. Mangione • T. Pell • Slavit • X.W. Sumers • G. Tree • S. Tharen • P. Yudrin|