Episodes
18
2 seasons
18 episodes · 2 seasons · 14.4 hours to binge
18
2 seasons
14.4 h
14h 24m
0 days
non-stop
7.5/10
674 votes
The Alienist runs to 18 episodes across 2 seasons, at roughly 48 minutes each. Watching every episode back to back is 14.4 hours of pure run time — that's 0 days and 14 hours without a single break.
More realistically, at two episodes a night you'll finish in about 9 days. That's 1.8 full 8-hour work days of screen time. Use the planner below to pick your own pace and get an exact finish date.
14.4 h
Pure run time
9 days
At 2 episodes/day
48 min
Per episode
Day 9: 100% done (18 of 18 episodes)
9.0
on average
7.2 h
on average
864
0 days non-stop
At 14.4 hours, The Alienist is longer than 29% of every series tracked here — making it a quick watch. Within the Drama genre the average is 48.5 hours, so The Alienist sits below that.
The Alienist is very well rated at 7.5/10 from 674 votes. With 14.4 hours of total run time it's a weekend project — plan accordingly before you press play.
All 18 episodes of The Alienist add up to 14.4 hours of pure run time — that's 0 days and 14 hours non-stop.
The Alienist has 18 episodes across 2 seasons, averaging about 48 minutes per episode.
At 1 episode a day it takes 18 days, at 2 episodes a day 9 days, and at a marathon pace of 8 a day just 3 days.
The Alienist is rated 7.5/10 from 674 votes. Budget 14.4 hours if you want to watch the whole thing.
Episodes, seasons, runtime (48 min/episode) and rating come directly from TMDB (as of 2/12/2026).
Use the days-between-dates calculator to count the exact days from today to your finish date.
Open the days calculator →