: The episode explores whether a plea deal is enforceable if it was made under "extortion" or false pretenses. Other notable "Double Down" episodes (different seasons):
: Detective Briscoe and ADA McCoy arrest one suspect, Henry Harp, who offers the driver’s location in exchange for a plea deal. However, when Titus is found dead, the DA's office suspects Harp knew he was already dead when he made the deal. [S1E12] Double Down
: A portal jump goes haywire, transporting the Battle Force 5 gang to an alternate universe . : The episode explores whether a plea deal
Which of these series were you looking for, or is there a you had in mind? Episode Recap: Castle - 2.02: "The Double Down" - IMDb when Titus is found dead