Money Heist season 5 theories: Is Alicia Sierra Tatiana’s sister? Fan theory explained

Money Heist fans have been drawing links between Berlin’s (played by Pedro Alonson) ex-wife Tatiana (Diana Gomez) and police inspector Alicia Sierra (Najwa Nimri) ever since they first appeared in part three. Some fans are even convinced the pair could be related in a season five twist. has rounded everything you need to know about this theory.

Is Alicia Sierra Tatiana’s sister in Money Heist?

In part three of La Casa de Papel, Berlin appeared in a number of flashback sequences revealing the plan for the new heist.

In one scene, he introduces the Professor (Álvaro Morte) to his girlfriend Tatiana who was a professional musician and thief.

During these flashbacks it is revealed she knows all about the heist plan and as fans of season four will know, she later marries Berlin.

However, the show has not yet revealed her significance and she has not appeared in the present-day timeline of the show.


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In spite of this, fans are convinced she could be key to the future of the drama.

Many have also pointed out her similarities to police inspector Sierra, who was introduced in part three as well.

Physically the pair look very similar and they are both heavily invested in the heist, which has led many viewers to think they could be related.

Posting on Reddit, user Rsq wrote: “Something about Berlin’s girlfriend, did anyone else find her to look a bit similar to Sierra?”

Another fan named Liprush also wrote about the pair: “We know that Alicia has a secret she hides from everyone, so, maybe they’re related…”

“Maybe they both have bangs for a reason? I can’t let anything slide in this show,” added viewer Teddybearjelly.

“The hair is basically the same color and the nose looks very similar. Maybe they are sisters.”

Finally user Biancaw wrote: “I also thought she might be the same as the new inspector. They’re too similar for it to not mean something.”


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Of course, there has been no official confirmation of anything like this in the hit series so far.

However, in season four, there were some more indications of links between the two as well.

In particular, some viewers thought Sierra’s speech about her husband German seemed to have some similarities to Berlin.

Firstly, this was indicated by the connection between their names, as well as the fact they both had a terminal illness.

Of course, viewers know Berlin was actually killed by the police in season two of La Casa de Papel.


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But the similarities could be hinting at some kind of link between the pair.

As well as this, there seems to be some indication Sierra could be switching sides to join the heist team.

Although she is holding a gun to the Professor’s head in the finale, viewers noticed she then sings the major song of the resistance in the credits.

Actor Najwa Nimri is heard singing Bella Ciao, which combined with the fact she has left the police as a wanted woman, could be an indication she wants to join the gang.

All of this could mean the show will have plenty more shocks in store in its fifth part.

Money Heist season 4 is available to stream now on Netflix.

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