Episode 4 of "Echoes of the Past" kicks off with another nostalgic flashback, where the group finds themselves engrossed in a lively game. In this tense scenario, Sherif is mistakenly tagged as the "killer," and Yehia teases him mercilessly, mentioning another girl in front of Nadia, who happens to walk by. Sherif's discomfort is palpable as he casts a glance at Nadia. Later, he stumbles upon Nadia and Ali locked in a heated argument. Nadia, stressed about her impending marriage and seeking Sawsan's approval, finds solace in Ali's comforting embrace.
In the present day, the tension in Yassin's household escalates as Sawsan threatens to leave him once again, citing his inability to manage Yehia. She had stayed with him only because he vowed to shield their family. In a fit of anger, Yassin takes out his frustrations on a hitman, who in turn pressures Sherif's doorman to spy for him.
Sherif watches the old tapes with a warm sense of nostalgia, revealing that Yehia harbored dreams of majoring in Computer Science while Sherif aspired to be a director. Together, they envisioned a spontaneous, unbridled lifestyle. On the other hand, Yehia believes he needs the tapes because Sherif might have captured moments that Yehia himself missed.
While Sherif is away, Layla approaches his wife with a pretext, asking for his camera. She sneaks into the attic and discovers the tapes, but her luck runs out when Sherif returns unexpectedly and tries to intercept her. Meanwhile, Yehia waits patiently outside, unaware that the doorman has spotted him and alerted the hitman. Yehia catches snippets of the commotion within and boldly confronts Sherif at the front door, taunting him about concealing something.
Defeated, Sherif plays the tape, which depicts Nadia in tears before Sherif makes an advance toward her. Yehia, convinced of Sherif's guilt, lunges at him. But Sherif quickly clarifies that he loved Nadia deeply and if he were truly guilty, he wouldn't have tried to prevent Yehia from taking the blame. Nadia was being manipulated by someone else, and the tapes hold the key to unlocking the truth, Sherif reveals.
At that critical juncture, the hitman materialized, aiming his weapon at Yehia with deadly intent. Sherif, with quick reflexes, assisted Yehia in evading the assassin's bullets, while his wife hastily dialed the police. The hitman fled the scene, leaving the authorities clueless and baffled. However, Sherif's wife, distressed by the entire chaotic turn of events, departed with their daughter in tow.
Elsewhere, Ali sought Mona's counsel, facing a stark dilemma: confront their parents or abscond. Mona, who had already fled Egypt, urged Ali to cease his incessant indecisiveness and take a definitive stance. Ali's resolve hardened upon learning that his father had abruptly dismissed 300 workers due to the bombing's aftermath. Furthermore, he discovered that Yassin had declared his father mentally incapacitated and seized control, asserting that his father's weakness would have led them all to ruin.
Concurrently, Layla and Yehia viewed the tape depicting Nadia's demise. They observed themselves swimming for an excruciating 13 minutes until they stumbled upon a boat. However, Yehia's memory jarred him; the actual dive lasted merely two minutes. Realization dawned upon him: the boat hadn't been stationed in its intended spot.
Another tape unfolded, revealing Layla tampering with Nadia's oxygen tank and engaging in playful antics. Layla was astounded; she recalled none of it. They both comprehended that their memories could not be trusted and resolved to visit the beach house for answers.
Upon returning home, Layla found her father indulging in solitary drinking. He pondered his parenting abilities and acknowledged his lifelong aspiration to nurture his family. Baffled by Mona and Sawsan's avoidance, and Ali's estrangement, he sought solace in rambling about his role in Nadia and Yehia's plight. He insisted that he had fulfilled his part by giving Yehia the promised funds, while his subsequent actions were purely defensive, aimed at safeguarding his loved ones.
The closing scene of Echoes of the Past Episode 4 saw Yehia watching another tape, which captured a fierce altercation between Mona and Nadia. The subsequent frame transitioned to Mona, armed with a blade, engrossed in some activity involving a scuba diving suit, leaving a chilling cliffhanger.
