S21 E1: All I Want For Christmas Is U

S21 E2: Upside-Down

S21 E3: United

S21 E4: Unsavoury

S21 E5: Uncle Sam

S21 E6: Ultras

S21 E7: Ufology

S21 E8: 'U' Animals

S21 E9: Unrelated

S21 E10: Upsadaisy

S21 E11: Underthings

S21 E12: University

S21 E13: Upbringing

S21 E14: Underground and Underwater

S21 E15: Ulex

S21 E16: VG: Part 1

S21 E17: VG: Part 2