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|Introduced||Daybreak, Part II|
|Portrayed by||Kevin McNulty|
|Frank Porthos is a Cylon|
|Frank Porthos is a Final Five Cylon|
|Frank Porthos is a Human/Cylon Hybrid|
|Frank Porthos is an Original Series Cylon|
|Frank Porthos in the separate continuity|
Frank Porthos is responsible for administering William Adama's polygraph examination in order to determine eligibility for an unmentioned civilian job, occurring sometime after the incident at the Armistice Line aboard Valkyrie.
Adama views the polygraph test as an insult to his honor and honesty, telling Porthos such before ending the test (Daybreak, Part II).