From: Elementary, the last two episodes ever… /sniff/
Names: Altamont, Sigerson
Reference: In the last two eps of stellar Sherlockian show Elementary, we see and hear about Sherlock using these two names as aliases as he is feigning death. In the original canon, everyone (including faithful Watson) thinks Holmes dead, until he returns in fine form to solve the murder of Ronald Adair (which happens to be another character name from canon that appears again here). Sigerson is one of the canon aliases Holmes tells Watson about upon his return.
In Elementary, Joan Watson is in on the fake death, but has lost track of him, and so in the last ep, Sherlock tells her in a verbatim quote from the original canon story “The Empty House”:
“You may have read of the remarkable explorations of a Norwegian named Sigerson; but I am sure it never occurred to you that you were receiving news of your friend.”
Altamont is a moniker that original canon Holmes uses not in the 3 years during his death, but in a story much more chronologically late than that: “His Last Bow.” In this rare omnisciently narrated short story, Holmes (now in his 60s) foils a German spy, with the help of an elderly, automobile-driving, comfortably-waistcoated Watson. Holmes had masqueraded for two years as an Irish-American tough guy named Altamont, and, after the conclusion of the story, delightfully complains not only about his goatee, but the fact that his language is no doubt forever sullied by his long years of Americanisms.
The last episode of Elementary was called “Their Last Bow,” no doubt in honor of the canon story of almost the same name.