This week the Legends of Tomorrow bounce around the timeline pretty well in “Camelot/3000.” While the title describes their two destinations, it also refers to an obscure comic series from the 1980’s. In the maxiseries Camelot 3000, as the title suggests, Arthur and his Knights come back in the year 3000, in a mix of fantasy and sci fi. Nice job working that in, writers. The voiceover this week is done by Ray Palmer, who suffers in comparison to Heat Wave’s masterful job at the beginning of “Turncoat.”