Sherlock immediately deduces John's military background, his psychosomatic limp, and his family history just by looking at him and his phone [2, 4].
In the context of the television series , S1E1 refers to the premiere episode titled " A Study in Pink ," which first aired on July 25, 2010 [5, 30]. While the episode is titled " A Study in Pink ," it is a modern adaptation of Sir Arthur Conan Doyle's first Sherlock Holmes novel, A Study in Scarlet [30, 33]. [S1E1] Study Date
The name " A Study in Pink " is a nod to the pink outfit and suitcase of the fourth victim, Jennifer Wilson [5, 29]. Sherlock immediately deduces John's military background