Doctor Who has seen a dip in ratings since the series, which stars Jodie Whittaker as the first female incarnation of the Time Lord, began in October. The iconic sci-fi show is now on its fifth episode, and Sunday night's episode The Tsuranaga Conundrum, which received an average of 6.1 million viewers. In comparison, the season's first outing The Woman Who Fell To Earth had 8.2 million watching, almost double the viewer ratings for last year's opener.