Episode – 4 of Falcon and the Winter Soldier was released on 9th April and received a positive response from the audience and critics. Episode – 4 is an emotional rollercoaster ride. There are plenty of hidden details and references that blow your mind. Here are 15 hidden details that you may have missed.
1. First blood on the shield
The most shocking scene in episode-4 is Captain America using the shield to kill a flash smasher. This particular scene portrays that John Walker is unworthy to carry the legacy of the shield. Steve Rogers faces the same kind of situation in Captain America: Civil War. But, he refuses to do so and smashes Tony Stark’s arc reactor. 
2. Deprogramming of the Winter Soldier
Steve Rogers goes to Wakanda to visit Winter Soldier after he was reprogrammed. The flashback scenes of Wakanda show that Wakandans were working on Bucky before Avengers: Infinity War.
3. John Walker- The Super Soldier
In the episode-3 of Falcon and the Winter Soldier, John Walker becomes a super-soldier. As Dr. Erskine already told us that the super-soldier serum intensifies the mindset of the individuals. As good becomes great in Steve Rogers, bad becomes worse in John Walker.
4. Bucky speaks in the Wakanda language.
At the beginning of the episode, Bucky and Ayo talk in the language of Wakanda. Bucky speaks in Wakanda language for the first time.
5. The iconic purple
In this scene, we can see that Zemo wears a purple sweater. This signifies the iconic purple color of Zemo in the comics. 
6. Bucky’s knife flip
As we know, that knife flip is the signature move of the winter soldier where he catches the knife and flips it. Marvel fans go gaga over this move. Also, this move proves that Bucky is no longer a killer and Wakandan deprogramming has worked. 
7. Shield in wall
In episode-4 of Falcon and the Winter Soldier, John Walker shows his superpowers by smashing his shield into the wall. This scene establishes John Walker’s violent impulses and struggling to get used to his super-human strength.
8. The ideal door slam
John Walker breaks in the door while looking for Karil. This scene is a nod to Captain America: The First Avenger, where Steve Rogers and commandos go in to fight for the first time.
9. Zemo’s vengeance
In the episode-4 of Falcon and the Winter Soldier, Zemo talks about the death of his son and his wife, Heike Zemo. This was the motive behind destroying the Avengers in Captain America: Civil War.
10. The mental health of soldiers
Sam describes how soldiers face several mental health issues and how he used to console them. It is a callback to Captain America: Winter Soldier, where he talks about the same thing when he meets Sam for the first time.
11. El Chapo
Zemo breaks out from his house using a secret tunnel in his bathroom. Sam describes this technique as ‘Pulling an El Chapo.’ This is a nod to Mexican criminal Joaquin El Chapo Guzman, who escaped from prison using a tunnel dug in the shower. 
12. Hoskins – The Super Soldier
Hoskins shares his desire to take super serum if he had a chance. It is a nod to the comics where he takes the super serum.
13. Captain America #312
There is always a deep connection between MCU and numbers. Sam gets a text message from Karli. His phone shows time 3:12 pm. This is a callback to Captain America #312.
14. Death of King T’Chaka
The Dora Milaje describes Bucky why Wakandans want to capture Zemo. Zemo is responsible for King T’Chaka’s death, and the death of the King made the Dora Milaje guilty and shameful for failing in protecting their King.
15. Issue #23
The hideout of Bucky, Sam, and Zemo has the number #23. This is a nod to Captain America Issue #23 comic.
16. Cap’s Handcuffs
John Walker carries handcuffs with him. Seems strange right? This is a reference to comics and merchandise products that were released way back in the 1970s. This small detail also showcases how Steve Rogers is different from John Walker as Captain America.
17. Karli is a kid
Sam Wilson talks about Karli Morgenthau to his colleagues and says, ‘She’s just a kid.’ This is a straightaway call back to Steve Roger’s dialogue in Captain America: Civil War. Steve Rogers passes the same comments about Scarlet Witch. Although the situations are different, the similarity is great.
Here’s the trailer:
