Mystery Night Unveiled: What to Watch on GREAT! Tuesday

Let’s cut through the noise and pick the stories that will keep you glued. The line‑up for Tuesday, 1 Sep 2026, is a mix of classic whodunits and fresh mystery thrillers, all delivered in the familiar, no‑fuss style of GREAT!. Below is a rundown of the top picks, a quick look at the timing and my personal verdict on why each one deserves a spot on your watch‑list.

08:00 – 08:10 Good News on GREAT! Extra

This 10‑minute segment offers a brief uptick in mood before the real mystery begins. Light, uplifting, and a nice palate cleanser.

08:10 – 09:06 Lost Letter Mysteries: Signed…

Cozy drama starring Eric Mabius and Kristin Booth. The premise—postal workers tracking undelivered mail—creates a gentle, investigative vibe. It’s a reliable pick for those who enjoy slow‑burn storytelling.

09:06 – 10:06 Lost Letter Mysteries: Time To…

A follow‑up with a tighter narrative arc. The tension spikes when the team receives a letter from a boy in danger. Still reliable, but with a slightly faster pace.

11:00 – 12:00 Unforgettable

Gold‑standard procedural drama featuring Carrie and Al solving a teenager’s unsolved murder. The episode (S1 Ep9) is a solid pick for fans of intricate plot twists. In my view, it stands out as the standout moment of the night.

12:00 – 13:00 In Plain Sight

Deputy U.S. Marshal Mary Shannon tackles a new case. The show’s focus on witness protection offers a different angle on mystery, but the pacing can feel uneven to some viewers.

13:00 – 14:00 Castle

A charismatic detective duo investigating a senator’s link to a murdered woman. The mix of humor and crime‑solving is one of the show’s strengths, though the episode (S5 Ep13) is more light than heavy.

14:00 – 15:00 Diagnosis Murder

Part 1 of a two‑episode arc where a doppelganger mob boss threatens Dr. Sloan. The premise is inventive, but the pacing may feel rushed for those who prefer deeper character studies.

15:00 – 16:00 Diagnosis Murder

Part 2 ramps up the danger. If you liked Part 1, this will hold up, but the episode complexity can test the viewer’s focus.

16:00 – 17:00 Murder, She Wrote

Jessica Christie tackles a murder mystery in Cabot Cove. The episode (S10 Ep20) is a dependable classic, though the plot may come across as somewhat formulaic.

17:00 – 18:00 Murder, She Wrote

Continuing the town‑centric mystery, the episode adds a carnival twist (S10 Ep21). It’s a pleasant, if predictable, watch.

18:00 – 19:00 Castle

Another episode (S5 Ep14) with a reality‑show murder twist. The story is engaging, but the mystery resolution feels a bit rushed.

19:00 – 20:00 Unforgettable

Episode (S1 Ep10) centers on a gang‑related shooting. The drama remains solid, though the stakes are moderate.

20:00 – 21:00 In Plain Sight

Case of a suspected witness shootout (S1 Ep5). The show maintains its procedural rhythm, albeit with limited twist.

21:00 – 21:56 Mystery 101: Killer Timing

A thriller featuring Jill Wagner and Kristoffer Polaha. The serial‑killer element adds a tense layer, and the pacing keeps the viewer engaged.

21:56 – 22:01 Good News on GREAT!

Another quick 5‑minute news recap. A nice breather before the next block.

22:01 – 22:55 Mystery 101: Killer Timing

Continuation of the thriller arc. The episode’s tension builds, and the resolution is satisfying, though it may feel familiar to seasoned fans.

22:55 – 23:51 Mystery 101: Playing Dead

Another Jill Wagner mystery with a chilling death threat. The plot is engaging, but the character dynamics are fairly conventional.

23:51 – 23:56 Good News on GREAT!

Closing the night with a brief positive recap. A useful wrap‑up for the day.

23:56 – 00:50 Mystery 101: Playing Dead

Final episode of the series. The pacing speeds up to keep viewers on edge.

00:50 – 02:15 Killer Ending

A drama thriller featuring Chelsea Hobbs. The premise of a novelist’s daughter being abducted is gripping, though the storyline may be too intense for some audiences.

02:15 – 02:25 Good News on GREAT! Extra

Another uplifting segment to calm the night’s intensity.

02:25 – 03:50 Hidden Crimes

Tricia Helfer stars in a thriller about stolen millions. The tension is palpable, and the chase keeps the audience hooked.

03:50 – 04:00 Good News on GREAT! Extra

Final brief recap before the day ends.

Bottom line: The night starts with light news recaps, shifts into cozy postal mysteries, then hits the high‑point with Unforgettable. The rest of the evening offers a balanced mix of procedural, classic, and thriller content—ideal for viewers who enjoy a well‑rounded mystery lineup.