The Adventure of the Egyptian Tomb (S05E01)

After an archaeologist suddenly passes away from a heart attack right after unveiling an ancient Egyptian tomb, his widow becomes suspicious of foul play. Convinced that something sinister is afoot, she reaches out to Poirot for assistance in uncovering the truth. As Poirot delves into the case, he navigates a web of intrigue surrounding the tomb and its secrets, determined to find out if there are darker forces at play behind her husband's untimely demise.