21.
“Mr. Robot — ‘407 Proxy Authentication Required.'”
“It was one of the most densely written and tense pieces of television I’ve ever seen — not to mention the phenomenal acting, editing, and cinematography.”
—u/ByDarwinsBeard
“This episode of TV is seriously the best episode of all time. Seriously.
I say proxy authentication required in my sleep.
If you are a lurker and never heard of Mr. Robot, I cannot recommend this masterpiece more. From start to finish, it’s the best TV series IMO.”
—u/jmjacoby95
Source: https://www.buzzfeed.com/ravenishak/best-television-episodes-of-all-time