- For other characters with the same name, see: Samuel.
|Colony||Tauron (emigrated to Caprica)|
|Parents||William Adama† (father)|
|Marital Status||Married to Larry (last name unknown)|
|Portrayed by||Sasha Roiz|
|Samuel Adama is a Cylon|
|Samuel Adama is a Final Five Cylon|
|Samuel Adama is a Human/Cylon Hybrid|
|Samuel Adama is an Original Series Cylon|
|Samuel Adama in the separate continuity|
|Samuel Adama in the primary continuity|
Both Adama and his brother, Joseph, came to Caprica as orphans from Tauron after their parents were killed in the Tauron Civil War. Their father was named William Adama, eponym of Sam's nephew. Joseph Adams, who changed his family name from Adama after he came to Caprica in part to escape the virulent anti Tauron racism, became a mob lawyer after the Guatrau of the Ha'la'tha paid for his law school education. In return Joseph became the lawyer for soldiers of the organization and also bribes public officials including judges to grease the wheels of justice in the Ha'la'tha's favor. Sam became an enforcer assassin for the organization. The two brothers have a very close relationship. Sam is very angry at the loss of his niece Tamara Adams and his sister-in-law, vowing to wreak vengeance on those who murdered them in the suicide bombing on the Lev.
Joseph Adams is given an assignment delivering a message to the Caprican Minister of Defense Val Chambers when he shows independence from the Ha'la'tha, who aided Chambers in his political career. Joseph requests time to think about it and is granted that time by the boss. After a request from Dr. Daniel Graystone to use his mob connections to steal a critical piece of technology from the Vergis Corporation in which they could make perfect replicas of their daughters, Joseph takes up the assignment and goes to deliver the Ha'la'tha's message to the Minister. Chambers refuses to be intimidated and hurls racist slurs at Joseph, threatens an investigation of the Ha'la'tha and their lawyers. In response to this, the organization orders Sam Adama to assassinate Chambers and he murders him in his own bed by slitting his throat and stabbing him several times in the midsection (Caprica pilot).
As Joseph's grief causes him to become more distant from his son, Sam takes a greater role in the boy's development. He advises William that he shouldn't take up smoking when he gets older because the authorities can get DNA from a cigarette butt, that when arrested for a minor crime he can avoid jail time by just paying the fine upfront, and that when someone tries to make him feel guilty he should find out what person feels guilty about and turn it against them (Rebirth).
|William Adama Sr. †||Isabelle Adama †|
|Larry||Sam Adama||Evelyn Adama||Joseph Adama||Shannon Adama †|
|Carolanne Adama †||William "Bill" Adama||Tamara Adama †||William "Willie" Adama †|
|Zak Adama †||Lee Adama||Anastasia Dualla †|
- In an e-mail, Espenson revealed that Sam's patron God is Mars and that a large element of his chest tattoo is a personal tribute to Mars. 
- The letters Gamma, Delta, Phi, Psi, and Omega tattooed on the upper part of Sam's chest are indicators of the oath he swore to the Ha'la'tha. 
- An Omega tattooed below Sam's right ear indicates his marital status. If Larry were to die, the bottom part of the Omega would be sealed up. 
- Wagner, Curt (February 17, 2010). Exclusive: 'Caprica' producer Jane Espenson explains Sam Adama's tattoos (backup available on Archive.org) (in ). Retrieved on March 25, 2010.