In 6th season's The Unnatural, another Arthur Dales is introduced. This new Arthur Dales explains to a bewildered Mulder that he and the other Arthur Dales are brothers. Their parents weren't big in the name department so they also "had a sister named Arthur too and a goldfish." (Arthur Dales, The Unnatural) This Arthur Dales also had some interesting past experiences concerning the unusual (in his case, an alien) although he didn't work on The X-Files (an interesting fact- the same actor that played the young Arthur Dales in Travelers also plays the young Arthur Dales in The Unnatural.)