GSI follow up a weapon trail that leads right into Kavkaz mafia headquarters on the west coast. GSI member Niklas Saxlid is the one in the group who is specialized in undercover operations, and he has penetrated Kavkaz' activities. But suddenly something happens and Niklas disappears.
| Actor | Role |
|---|---|
 Jakob EklundJohan Falk | Johan Falk |
 Jens HulténSeth Rydell | Seth Rydell |
 Alexander KarimNiklas Saxlid | Niklas Saxlid |
 Christian SvenssonRamzan | Ramzan |
 Meliz KarlgeSophie Nordh | Sophie Nordh |
 Björn BengtssonJack Rolander | Jack Rolander |
| MMårten SvedbergVidar Pettersson | Vidar Pettersson |
 Aliette OpheimMadeleine Wiik | Madeleine Wiik |
 Henrik LundströmLeffi | Leffi |
 Mikael TornvingPatrik Agrell | Patrik Agrell |
 Peter FranzénMilo Mikhailov | Milo Mikhailov |
 Christian BrandinConny Lloyd | Conny Lloyd |
 Jonas BaneBill | Bill |
 Ivan Mathias PeterssonArtem | Artem |
 Marie RichardsonHelén Falk | Helén Falk |
 Jonatan RodriguezRenato | Renato |
 Lukas LoughranZacke | Zacke |
 Mahmut SuvakciAli Mahmoud Hansson | Ali Mahmoud Hansson |
| ZZeljko SantracMatte | Matte |
 Małgorzata PieczyńskaRyska kvinnan | Ryska kvinnan |
| SSemir ChattyMairbek | Mairbek |
| AAnders GustavssonViktor Eriksen | Viktor Eriksen |
| VVuksan RovcaninVasilj | Vasilj |
 Ulf StenbergBamse | Bamse |
 Micke SpreitzDanne | Danne |
 Leo WandeMikael | Mikael |
 Magnus MarkOssian | Ossian |
 Daniel LarssonBjörkman | Björkman |
 Erik BolinUllbrandt | Ullbrandt |
 Johan HedenbergÖrjan | Örjan |