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 (88 votes)
Episode average: 7.4 -0.9 vs IMDb
Seasons: 6
Streaming (US): Peacock
Language: EN
Type: TV series

Rating trend: this show's seasons do not settle into one shape. Rising Shows ranks whole shows by the shape of their rating trend rather than one average score, which is how you find a show that got better rather than a show that started well.

Browse shows by rating shape → Open in Rising Shows app → View on IMDb

Ratings refreshed Oct 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 47 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
32	The Plan	7.4	5
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)

7.43 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	7.5	10
3	The Woman Who Couldn't Scream	7.6	8
4	The Devil was Watching	7.2	6
5	Left for Dead	7.4	8
6	Point Blank	7.1	8
7	Complicated	7.6	9
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	7
3	Twisted Faith	7.6	7
5	In a Lonely Place	7.8	6
9	Kill Switch	7.6	5

Season 5 (2025)

7.28 avg 8 episodes 7.2 → 7.8 85 min avg

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	7.1	7
7	True Confession	7.1	7
8	After the Dance	7.8	6

Season 6 (2025)

7.03 avg 4 episodes 6.9 → 6.8 74 min avg

Season 6 episodes - IMDb ratings
#	Title	Rating	Votes
2	The House on Shalimar Way	6.9	8
3	65 Seconds	6.8	6
7	Evil Walked Through the Door	7.6	5
9	The Day Akia Disappeared	6.8	6