Theres a spy in our ranks and a numbers game in Verdansk. Season Fives offering of free content includes a first-in-the-series Double Agent mode in Multiplayer alongside new and classic Black Ops maps, in addition to new Zombies content, as well as new Perks in Warzone that are set to shift the meta and more.
Source: N4G PC Call of Duty®: Warzone Season Five Patch Notes