"What's My Line, Part One" is the ninth episode of the second season of Buffy the Vampire Slayer, and is the twenty-first episode in the series. It was written by Joss Whedon, Marti Noxon and Howard Gordon and directed by David Solomon. It was originally broadcast on November 17, 1997. Spike brings in three professional bounty hunters to eliminate Buffy while she ponders on what her profession might be if her fate was not already sealed. Buffy meets another Slayer, Kendra Young, much to Buffy's dismay.