Once Upon a Time
2011–2018 · Ended
7 seasons · 156 episodes
≈ 122h 12m Estimated · Low confidence View runtimeTV Shows Starting With O
Browse series beginning with O and compare how much time they take to watch. Select any show to see its detailed runtime, progress calculator and release information.
Catalog results
14 shows 
Once Upon a Time in Wonderland
2013–2014 · Ended
1 seasons · 13 episodes
≈ 10h 11m Estimated · Low confidence View runtime
One Day at a Time
1975–1984 · Ended
9 seasons · 209 episodes
≈ 80h 7m Estimated · Low confidence View runtime
One Day at a Time
2017–2020 · Ended
4 seasons · 45 episodes
≈ 16h 44m Estimated · Low confidence View runtime
One Piece
Year unknown · Running
1,180 available episodes
≈ 452h 42m Estimated · Low confidence View planner
One Piece
Year unknown · Running
16 available episodes
15h 33m Published runtime View planner
One Tree Hill
2003–2012 · Ended
9 seasons · 187 episodes
≈ 147h 16m Estimated · Low confidence View runtime
Only Murders in the Building
Year unknown · Running
50 available episodes
29h 17m Published runtime Next episode in 36 days View planner
Orange Is the New Black
2013–2019 · Ended
7 seasons · 91 episodes
91h 26m Published runtime View runtime
Orphan Black
2013–2017 · Ended
5 seasons · 50 episodes
≈ 39h 10m Estimated · Low confidence View runtime
Outer Banks
2020–2026 · Ended
5 seasons · 50 episodes
42h 48m Published runtime View runtime
Outlander
2014–2026 · Ended
8 seasons · 101 episodes
≈ 80h 24m Estimated · Low confidence View runtime
Over the Garden Wall
2014 · Ended
1 seasons · 10 episodes
≈ 2h Estimated · Low confidence View runtime
Ozark
2017–2022 · Ended
4 seasons · 44 episodes
44h 42m Published runtime View runtime