Warning: this article contains spoilers for Better Call Saul season 6.

As a prequel to Breaking Bad, Better Call Saul reveals many secrets about Vince Gilligan's first series, and season 6 better explains how Gus Fring constructed the idea for his meth superlab. Throughout Better Call Saul and Breaking Bad, Gus Fring is known for his cautious and calculated schemes, appearing as just an innocent businessman to unassuming civilians. Even in his first meeting with Walter White in Breaking Bad, Gus assumes his persona as the owner of Los Pollos Hermanos and only breaks character when necessary. One of the greatest examples of Gus' circumspect nature is how the hub of his drug empire in Breaking Bad is situated in a clandestine laboratory that's hidden underneath a laundry.

While Gus' superlab is not in operation yet in Better Call Saul season 6, its construction began in season 4. Mike was in charge of Werner Ziegler and his team of German engineers, who constructed most of the laboratory that Walt and Jesse work in during Breaking Bad. The construction is yet to be complete, however, after Ziegler went rogue and sparked the curiosity of Lalo Salamanca, giving Lalo his first inklings that Gus is working towards his own aims. In Better Call Saul season 6, Gus is convinced that Lalo is still alive, and has ramped his precautions up to another level.

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Better Call Saul season 6 shows that Gus' secrecy extends to all aspects of his life, even his home. Better Call Saul season 6 episode 4, "Hit and Run," sees Gus travel in an underground tunnel between his house and his neighbors'. While his neighbors' house appears ordinary, they only occupy a small room of the house, while Gus uses their living room as a surveillance site. This passage and base of operations share huge similarities with his superlab and demonstrate how Gus may have first come up with the idea for his lab under a laundry. The fact that both look normal at face value also mirrors Gus' personality - squeaky clean on the surface, but underneath his veneer, he hides terrible and dangerous secrets.

Breaking Bad

It's fitting that the entrance to the hidden passage in Better Call Saul's Gus Fring house is in his laundry. While hidden passages in basements might seem like a cliché in the world of Better Call Saul now, it appears that this passage has been in place for a long time. The fact that Gus' neighbors remain casual, not even acknowledging Gus as he strides through their bedroom, suggests they are used to the constant invasion by Gus and his men. If this passage has been in place for a while and remains undetected, it explains why Gus believes his superlab would work. Just like the passage in his home, Gus sees a laundry as the perfect cover for his lab. One way the meth superlab from Breaking Bad evolves from the passage in Gus' home is its entrance. The entrance to the passage lies behind a shelving unit, however, the superlab's entrance is more intricate, as it is underneath an industrial laundry unit that can lift off the floor. The improvement could indicate that the passage in Gus' home could eventually be uncovered but it's more likely just a necessary precaution as Gus' home is naturally a more secure location than a laundry on the outskirts of Albuquerque.

Both the superlab and Gus' hidden passage perfectly reflect Gus' true character and how he presents himself to the outside world. To his customers, Gus appears well-mannered and professional, a man happy to help with complaints in his restaurant and he gives to charity. Even Gus' appearance reflects this facade and his cautiousness. Better Call Saul season 6, episode 4 shows how Gus keeps all his yellow shirts and his wardrobe in perfect order - his appearance is crucial to maintaining his businessman persona. Similarly, his house and the laundry seem perfectly normal, without a shred of suspicion to be found. When scratched beneath the surface, however, his home and the laundry reveal their unsettling true purpose. The same can be said for Gus, who when pushed to his limits and away from the eyes of the outside world, is capable of evil and murderous acts.

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New episodes of Better Call Saul air every Monday on AMC.