List of Numbers episodes (season 1)

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Numbers Season 1
Numb3rs season 1 DVD.png
DVD box
Country of origin United States
No. of episodes 13
Original network CBS
Original release January 23 (2005-01-23) – May 13, 2005 (2005-05-13)
Season chronology
Next →
Season 2

Season one of Numbers, an American television series, premiered on January 23, 2005 and finished on May 13, 2005. The first season sees the start of the working relationship between Don Eppes, an FBI agent, and his genius brother Charlie, an applied mathematician and professor at a local university. The rest of Don's FBI team consists of Terry Lake and David Sinclair. Don and Charlie's father, Alan Eppes, provides emotional support for the pair, while the brilliant Professor Larry Fleinhardt and promising doctoral student Amita Ramanujan provide mathematical support and insights to Charlie.


No. in
Title Directed by Written by Original air date Prod.
U.S. viewers
1 1 "Pilot" Davis Guggenheim & Mick Jackson Nicolas Falacci & Cheryl Heuton January 23, 2005 (2005-01-23) 101 24.92[1]

Charlie assists Don on a serial rapist case by calculating a "hot zone", an area where the rapist is most likely to live. Don is removed from the case after Charlie's formula fails to turn up any leads but later a comment from their father then leads Charlie to change the equation to calculate two points of origin, instead of one.

Mathematics used: Geographic profiling, probability theory, 11-dimensional supergravity theory and projectile motion
2 2 "Uncertainty Principle" David Von Ancken Nicolas Falacci & Cheryl Heuton January 28, 2005 (2005-01-28) 104 15.46[2]

Charlie successfully predicts the time and place of a bank robbery using what he says are elements of Heisenberg's uncertainty principle, but when the planned arrest goes bad, he retreats into the math problem P vs. NP.

Mathematics used: P vs. NP and Heisenberg's uncertainty principle
3 3 "Vector" David Von Ancken Jeff Vlaming February 4, 2005 (2005-02-04) 103 11.55[3]

A deadly strain of influenza is spreading through Los Angeles, killing many people. Don investigates whether the strain was released deliberately, and Charlie tries to calculate the origin and likely spread of the virus.

Mathematics used: Patient Zero, Viral vector, Vector and SIR model
4 4 "Structural Corruption" Tim Matheson Liz Friedman February 11, 2005 (2005-02-11) 105 10.68[4]

An engineering student commits suicide, but Charlie suspects foul play. Don disagrees, but he agrees to help Charlie investigate whether the student was murdered because of his research into a building's structural integrity.

Mathematics used: Pendulum and Foucault pendulum
5 5 "Prime Suspect" Lesli Linka Glatter Doris Egan February 18, 2005 (2005-02-18) 106 10.49[5]

A young girl is kidnapped, but her parents refuse to cooperate with Don's investigation. The girl's father is a mathematician, and the kidnapping may be related to his work on the Riemann hypothesis.

Mathematics used: Cryptography, prime numbers, Riemann hypothesis and Riemann zeta function
6 6 "Sabotage" Lou Antonio Liz Friedman February 25, 2005 (2005-02-25) 102 11.46[6]

Don is investigating a series of train accidents which are recreations of previous wrecks. The saboteur leaves a note composed entirely of numbers.

Mathematics used: Kasiski examination, Cryptography, Fibonacci sequence, golden ratio and Beale ciphers
7 7 "Counterfeit Reality" Alex Zakrzewski Andrew Dettman March 11, 2005 (2005-03-11) 107 10.55[7]

A strange series of robberies leads Don into a case involving counterfeit money, kidnapping and murder. Don is assisted by Secret Service agent Kim Hall while Charlie uses math to analyze fake bank notes and track their spread.

Mathematics used: Guilloché pattern and wavelet analysis
8 8 "Identity Crisis" Martha Mitchell Wendy West April 1, 2005 (2005-04-01) 108 9.99[8]

A new case with disturbing similarities to an old case leads Don to question whether he put the right man in jail. While Don tries to find the connection between the two cases, he asks Charlie to look for mistakes or flaws in the first case.

Mathematics used: Poker, geometric progression - paper folding, pyramid scheme, fingerprint and Schrödinger's cat
9 9 "Sniper Zero" J. Miller Tobin Ken Sanzel April 15, 2005 (2005-04-15) 109 10.54[9]

Don is investigating a series of sniper killings, and Charlie is searching for an underlying pattern to the attacks. What appears to be bad data can't be eliminated from the analysis, because it fits the only pattern he can find.

Mathematics used: Projectile motion, Tipping point, regression toward the mean and exponential growth
10 10 "Dirty Bomb" Paris Barclay Andrew Dettman April 22, 2005 (2005-04-22) 110 11.50[10]

A truck carrying radioactive waste disappears, and Don figures that a dirty bomb will be set off in downtown Los Angeles. When three suspects are caught but refuse to turn on each other, Charlie must try to convince one of them to give up the others and give the location of the waste.

Mathematics used: Prisoner's dilemma and radioactive decay
11 11 "Sacrifice" Paul Holahan Ken Sanzel April 29, 2005 (2005-04-29) 111 10.80[11]

A researcher is murdered in his home, and Charlie must reconstruct data erased from his computer while Don investigates possible suspects.

Final appearance of: Sabrina Lloyd as Terry Lake

Mathematics used: Sabermetrics and econometrics
12 12 "Noisy Edge" J. Miller Tobin Nicolas Falacci & Cheryl Heuton May 6, 2005 (2005-05-06) 112 11.80[12]

An unidentified flying object travels over Los Angeles and then disappears. Don suspects terrorist activity, and Charlie tries to find out more about the object and its flight path.

Mathematics used: Combinatorics and conditional probability distribution - "squish-squash" with Fourier analysis
13 13 "Man Hunt" Martha Mitchell Andrew Dettman May 13, 2005 (2005-05-13) 113 11.29[13]

A prison bus crashes, allowing two dangerous convicts to escape. Don is joined by his former partner from Fugitive Recovery, Billy Cooper as the Bureau launches an effort to recapture them.

Mathematics used: Bayesian inference, Markov chain, Chapman–Kolmogorov equation and Monty Hall problem


  1. ^ "Weekly Program Rankings". ABC Medianet. January 25, 2005. Retrieved February 10, 2010. 
  2. ^ "Weekly Program Rankings". ABC Medianet. February 1, 2005. Retrieved February 10, 2010. 
  3. ^ "Weekly Program Rankings". ABC Medianet. February 8, 2005. Archived from the original on December 21, 2008. Retrieved February 10, 2010. 
  4. ^ "Weekly Program Rankings". ABC Medianet. February 15, 2005. Retrieved February 10, 2010. 
  5. ^ "Weekly Program Rankings". ABC Medianet. February 23, 2005. Retrieved February 10, 2010. 
  6. ^ "Weekly Program Rankings". ABC Medianet. March 1, 2005. Retrieved February 10, 2010. 
  7. ^ "Weekly Program Rankings". ABC Medianet. March 15, 2005. Retrieved February 10, 2010. 
  8. ^ "Weekly Program Rankings". ABC Medianet. April 5, 2005. Retrieved February 10, 2010. 
  9. ^ "Weekly Program Rankings". ABC Medianet. April 19, 2005. Retrieved February 10, 2010. 
  10. ^ "Weekly Program Rankings". ABC Medianet. April 26, 2005. Retrieved February 10, 2010. 
  11. ^ "Weekly Program Rankings". ABC Medianet. May 3, 2005. Retrieved February 10, 2010. 
  12. ^ "Weekly Program Rankings". ABC Medianet. May 10, 2005. Retrieved February 10, 2010. 
  13. ^ "Weekly Program Rankings". ABC Medianet. May 17, 2005. Retrieved February 10, 2010. 

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