The team tracks an elusive international arms dealer who recently murdered an MI6 officer; Abby races Delilah to the hospital when her labor starts three weeks early.
A USC student is murdered in Compton; Kenny and Andy canvass the neighborhood; Nate and Sammy investigate a house where a party took place; John and Ben attend the funeral of a cop.
When the HPD system is hacked and one of the Five-0's informants ends up dead, McGarrett enlists the help of hacker Aaron Wright, whom he just imprisoned.