As always, Sickan has come up with a new plan. This time he wants to rob the IKEA furniture store. During their nightly break-in Sickan discovers that the store is used as a secret smuggling central for sending American computers to the Soviet Union. The computers are picked up by Soviet submarines sneaking into the Swedish archipelago. Naturally, it is their arch enemy Wall-Enberg who is behind all of this.
Unfortunately the movie Jönssonligan dyker upp igen is not yet available on HBO Max.
| Production | Ingemar Ejve | Producer |
| Art | Bengt Peters | Production Design |
| Production | Waldemar Bergendahl | Producer |
| Writing | Rolf Börjlind | Screenplay |
| Camera | Gunnar Källström | Director of Photography |
| Directing | Mikael Ekman | Director |
| Production | Jan Marnell | Production Manager |
| Costume & Make-Up | Suzanne Bergmark | Makeup Department Head |
| Sound | Ragnar Grippe | Original Music Composer |
| Writing | Gösta Ekman | Screenplay |
| Costume & Make-Up | Mona Theresia Forsén | Costume Design |
| Costume & Make-Up | Inger Pehrsson | Costume Design |
| Writing | Mikael Ekman | Screenplay |
| Editing | Jan Persson | Editor |
| Directing | Mona Haskel | Script Supervisor |
| Sound | Anders Ingemarsson | Sound |
| Sound | Gert Landevall | Sound Editor |
| Sound | Adam Svenningsson | Sound Editor |
| Sound | Christjan Wegner | Sound |
| Sound | Kjell Westman | Sound Mixer |
| Art | Magdalena Jangard | Set Decoration |
