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Monsters Inside: The 24 Faces of Billy Milligan (2021)

2021 • 1 season • TV-MA
JustWatch▲ +3#9855IMDb6.3/105,525TMDB70%76Rotten Tomatoes—Metacritic—
On September 28, 2026
#7090▼ 532
7090th by Pulse TV show online
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Most Popular Monsters Inside: The 24 Faces of Billy Milligan Cast Members

Ron O'Brien is the most popular Monsters Inside: The 24 Faces of Billy Milligan cast member right now, with a Popularity Score of 0.64. Updated September 30, 2026.

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Cast
Popularity
1

Ron O'Brien

Self. Prosecutor.
0.6
2

Allen J. Frances

▼ 0.1Self. Prof. of Psychiatry./78 years during filming
0.4
3

Sheila Porter

Self. Psychologist.
0.3
4

Lewis Williams

Self. Attorney.
0.3
5

Jim Morrison

Self. Billy's Brother.
0.3
6

Jim Murray

Self. Billy's Friend.
0.3
7

Pam Flynn

Self. Billy's Childhood Friend.
0.3
8

Terry Sherman

Self. Prosecutor.
0.3
9

Kathy Preston

Self. Billy's Sister.
0.3
10

Sharon Lansing

Self. Billy's Childhood Friend.
0.3
11

Dr. Ronald Litvak

Self. Psychiater
0.3
12

Dorothy Moore

Self. Billy's Mother.
0.3
13

George Harding

Self. Psychiatrist.
0.3
14

Dr. Marlene Kocan

Self. Psychologist
0.3
15

Bob Baumgardt

Self. Billy's Former Brother-in-law.
0.3