Dateline: Unforgettable (2021)

Name: Dateline: Unforgettable
Genre: Reality-TV
Rating: 8.3

Reality-TV

A series of reports chosen by "Dateline" correspondents that answers the question they most often get asked — what their most memorable story is and why.

IMDb rating: 8.3 (83 votes)
Seasons: 6
Streaming (US): Peacock
Language: EN
Type: TV series

Browse all Rollercoaster seasons in the explorer → Open in Rising Shows app → View on IMDb

Ratings refreshed Jul 3, 2026 · 6 seasons indexed

Seasons

Season 1 (2021)

7.50 avg 22 episodes 8.2 → 7.2 60 min avg

Rollercoaster

Season 1 episodes — IMDb ratings
#	Title	Rating	Votes
4	Lauren's Promise	8.2	12
5	The Grudge	7.7	7
6	Conduct Unbecoming	7.8	11
7	And Then There Were Three	8.0	9
8	Collision	7.0	8
9	Voices for Vanessa	7.4	7
10	She Never Left	7.2	9
11	Into the Night	7.8	6
12	A Texas Twist	7.5	6
13	At the Bottom of the Lake	7.5	11
14	The Goldfinger Mystery	7.2	10
15	Shannon's Story	7.1	8
16	The Perfect Guy	7.9	10
17	Frantic	7.3	11
18	Finding Venus	7.8	10
19	The Black Box	7.5	8
20	Deliberate Evil	7.9	10
21	At the Edge of Town	6.9	10
22	The Interrogation	7.6	7
23	Unchecked Evil	7.7	9
24	Mystery at Heath Bar Farm	6.9	8
25	The Collector	7.2	9

Season 2 (2022)

7.29 avg 46 episodes 7.6 → 7.6 60 min avg

Season 2 episodes — IMDb ratings
#	Title	Rating	Votes
1	Under the Desert Sky	7.6	10
2	The Officer's Wife	7.3	11
3	The Eastlake Conspiracy	7.9	10
4	A Novel Defense	7.3	13
5	Smoke and Mirrors	7.0	8
6	Somebody's Daughter	7.2	12
7	The Last Dance	7.2	10
8	Return to the Lonely Road	7.3	11
9	The Man Who Talked to Dogs	7.8	8
10	Out of the Darkness	7.0	7
11	Justice for Nikki	7.2	11
12	House of Secrets	7.2	9
13	The Black Widow of Lomita	7.6	8
14	The Pink Gun Mystery	7.4	11
15	Even the Devil Went to Church	7.4	11
16	The Day Jennifer Disappeared	7.4	9
17	In the Dead of Night	7.6	7
18	A Promise to Helene	7.8	9
19	Death of a Golden Girl	6.3	9
20	Secrets from the Grave	7.4	10
21	Fallen	6.6	9
22	The Box	7.1	7
23	The Creek	7.1	9
24	Mystery on Blood Mountain	7.7	7
25	The Betrayal of Sarah Stern	7.4	8
26	The Dead of Night	7.2	6
27	Deadly Valentine	7.4	5
28	Down the Back Staircase	7.3	6
30	What Happened to Amy?	7.0	5
31	The Secret of Spirit Lake	6.6	7
33	The Haunting	7.6	5
34	Internal Affairs	7.4	5
35	Return to Manitowoc County	6.8	5
36	Twisted	7.3	7
37	Good & Evil	7.4	8
38	The House	6.8	6
39	Breakout	7.2	6
40	Family Affair	7.4	5
41	The Women and Dirty John	7.3	6
42	Open Water	7.1	7
43	The Silhouette	7.0	6
44	The Sting	7.2	6
45	Deadly Desire	7.6	8
46	Plot Twist	7.7	7
47	The Life and Death of Princess Diana	7.5	6
48	The Last Dive	7.6	5

Season 3 (2023)

7.47 avg 11 episodes 7.8 → 7.4

Season 3 episodes — IMDb ratings
#	Title	Rating	Votes
1	On a Dark, Deserted Highway	7.8	9
2	Siren Song	7.6	9
3	The Woman Who Couldn't Scream	7.6	8
4	The Devil was Watching	7.4	5
5	Left for Dead	7.4	7
6	Point Blank	7.3	7
7	Complicated	7.6	8
8	The Window	7.7	6
9	The Evil that Watches	7.1	7
10	The Murder of Lorenzen Wright	7.3	7
11	A Walk in the Rain	7.4	10

Season 4 (2024)

7.72 avg 5 episodes 7.8 → 7.6

Season 4 episodes — IMDb ratings
#	Title	Rating	Votes
1	What Happened in Vegas	7.8	6
2	Lonestar Obsession	7.8	6
3	Twisted Faith	7.6	7
5	In a Lonely Place	7.8	6
9	Kill Switch	7.6	5

Season 5 (2025)

7.25 avg 8 episodes 7.2 → 7.4

Rebound

Season 5 episodes — IMDb ratings
#	Title	Rating	Votes
1	Killer Role	7.2	10
2	Safari Story	7.1	8
3	The Favorite Son	7.8	9
4	The Trial of Lori Vallow Daybell	7.4	7
5	The Bridge	6.7	6
6	The Life She Wanted	7.2	6
7	True Confession	7.2	6
8	After the Dance	7.4	5

Season 6 (2025)

6.83 avg 3 episodes 6.9 → 6.8

Declining

Season 6 episodes — IMDb ratings
#	Title	Rating	Votes
2	The House on Shalimar Way	6.9	7
3	65 Seconds	6.8	5
9	The Day Akia Disappeared	6.8	5

Dateline: Unforgettable (2021)

Seasons

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