Main story: Election security in the United States; plus, Trump-Ukraine scandal and Alexander Vindman.
Guests: Ken Burns (voice-over).

Last Week Tonight With John Oliver Season 6 Episodes...

• s06e01 - Season 6, Episode 1
• s06e02 - Season 6, Episode 2
• s06e03 - Season 6, Episode 3
• s06e04 - Season 6, Episode 4
• s06e05 - Season 6, Episode 5
• s06e06 - Season 6, Episode 6
• s06e07 - Season 6, Episode 7
• s06e08 - Season 6, Episode 8
• s06e09 - Season 6, Episode 9
• s06e10 - Season 6, Episode 10
• s06e11 - Season 6, Episode 11
• s06e12 - Season 6, Episode 12
• s06e13 - Season 6, Episode 13
• s06e14 - Season 6, Episode 14
• s06e15 - Season 6, Episode 15
• s06e16 - Season 6, Episode 16
• s06e17 - Season 6, Episode 17
• s06e18 - Season 6, Episode 18
• s06e19 - Season 6, Episode 19
• s06e20 - Season 6, Episode 20
• s06e21 - Season 6, Episode 21
• s06e22 - Filibuster
• s06e23 - Legal Immigration
• s06e24 - Season 6, Episode 24
• s06e25 - Season 6, Episode 25
• s06e26 - Season 6, Episode 26
• s06e27 - Season 6, Episode 27
• s06e28 - Season 6, Episode 28
• s06e29 - Season 6, Episode 29
• s06e30 - Season 6, Episode 30

Last Week Tonight With John Oliver Show Summary

Presenting a satirical look at the week in news, politics and current events, the show will be hosted by comedian John Oliver, an alumnus of The Daily Show. The show will be similar in scope, exploring a satirical look at news, politics and current events on a weekly basis every Sunday.