The CBI work a 25 year old case which is connected to Visualize and Red John. Lisbon also thinks about her future after the arrest of Tommy Volker.
Kensi and Deeks go house sitting in the suburbs to flush out a Russian sleeper cell.
The BAU is called to determine the real reason behind what appears to be a mass suicide by a small group of young men at a military academy. Meanwhile, Hotchner and Morgan are at odds with each other when they discover their investigation could be jeopardized by another team member.moreless
A manhunt is launched for professional hitman, Hal Lockwood, after he escapes during a court hearing. Lockwood possesses information about the murder of Beckett's mother. As the hunt proceeds, Castle and the team find there's someone with connections to law enforcement who's linked both to the death of Johanna Beckett and to Lockwood's escape. The season finale leads to a highly emotional and deadly conclusion with the search for Lockwood and his co-conspirator.moreless
While consulting with the NTSB at the scene of a wreck, Don learns that this tragedy is one of a series of recreated accidents involving railroad negligence. As is the pattern with the previous train wrecks, an undecipherable numerical code is left at the site, which Don recruits Charlie to solve. Don's investigation leads him and his team to a dangerous standoff with their suspect, who has surprising ties to the railway system.moreless