Cause and Effect

"Cause and Effect" is the 16th episode and the season finale of the sixth season and series finale of the American television series Numbers. In the episode, Federal Bureau of Investigation (FBI) agents and mathematicians attempt to find one agent's gun before it is used in a violent crime. When series creators/executive producers Cheryl Heuton and Nicolas Falacci learned that the number of episodes airing during the season was reduced, they felt that they needed to finish storylines in case the series was cancelled. To do so, they wrote an open-ended story to serve as either a season finale or a series finale. Originally set to air in May, and February, "Cause and Effect" first aired in the United States on March 12, 2010. Critics mostly focused on the potential cancellation of the series, but two reviewers gave the episode reviews. "Cause and Effect" became the Numb3rs series finale after CBS's cancellation of the series on May 18, 2010. Plot summary Drs. Charlie Eppes (David Krumholtz) and Amita Ramanujan (Navi Rawat) are married at CalSci. Charlie's father Alan Eppes (Judd Hirsch), Charlie's older brother FBI Special Agent Don Eppes (Rob Morrow), and friends FBI Special Agents David Sinclair (Alimi Ballard), Colby Granger (Dylan Bruno), Nikki Betancourt (Sophina Brown), and Assistant United States Attorney Robin Brooks (Michelle Nolden) attend the ceremony. Charlie and Amita's friend and colleague Dr. Larry Fleinhardt (Peter MacNicol) officiates. After receiving a call from FBI Special Agent Liz Warner (Aya Sumika), Don and David leave the reception to arrest Ted Dacosta (Luke Rosen), a man wanted on fraud charges. During the arrest, a man who has just learned that Decosta had swindled him tackles Don and David. The tackle knocks Don's gun away from him. Someone picks the gun up and walks away from the scene. A member of the Los Angeles Police Department (LAPD) questions Don about the incident, and Don completes the required paperwork. Nikki contacts her former colleagues at the LAPD for assistance. At Charlie's house, Alan and Charlie notice that Don is upset about losing his gun. Charlie offers to help his brother locate the gun, but Don refuses, citing Charlie and Amita's upcoming visiting professorships at Cambridge. Don receives a call about two drug dealers who were fatally shot with Don's gun. None of the neighbors appear upset about the dealers' deaths. A tip from LAPD leads the FBI team to the leader of the community crime watch.