The song "Mr. X" by Ultravox tells the story of a protagonist who becomes fixated on a picture of a mysterious stranger, believing that they have encountered this person in different situations. The lyrics suggest that the picture was taken in the forties, indicating an old-fashioned style. The protagonist contemplates the possibilities of this stranger's identity – from a potential killer to a blind man with a cane or someone who died in a car crash. However, despite searching for him, the protagonist is unable to find the stranger who resembles the picture. The lyrics describe a moment where the protagonist almost mistakes someone else for the stranger, but upon closer inspection, realizes that it isn't him. They also mention seeing the stranger sitting on an airplane wing in an airport, but it seems that the stranger doesn't notice their presence. Throughout the song, there is a sense of longing and curiosity about the stranger, as represented by the repeated chorus of "Mr. X." The protagonist feels a strong connection to this person, having a "funny feeling" that they know who he is. Overall, "Mr. X" explores themes of mystery, obsession, and the elusive nature of identity. It depicts the protagonist's futile search for this enigmatic stranger, leaving them longing for an explanation or a deeper understanding of who he is.