Question: What episode of "How I Met Your Mother" had the American musician Keith Konrad Slettedahl and had the lowest recorded viewership for season one?
Sentence (from "24: Legacy"): The series is a spin-off of "24" which was created by Joel Surnow and Robert Cochran and its premiere served as the lead-out program for Super Bowl LI before moving to its regular time slot of Monday at 8:00 p.m.
Relevant evidence: No