Browse the full Investigation Discovery TV guide for Monday, 18 May 2026. 28 programmes listed , including 6 tonight. UK listings updated daily — scroll down to tonight's highlights or use the day tabs above to browse the weekly schedule.
Early Morning
00:00
1h
The disappearance of Adam Chase
01:00
1h
A man vanishes from a small Idaho town, leaving a trail of strange clues
02:00
30m
A woman arrives at her parents' house to find them bleeding on the floor
02:30
30m
A former escort hires a hitman to kill her husband
03:00
30m
A young man asks to assist in a brutal murder investigation
03:30
30m
Investigators fear they may have a rare female psychopath on their hands
04:00
1h
The 2013 murder of respected basketball coach Jimmy McClain
05:00
1h
The case of Cody MacPherson
Morning
06:00
30m
Home shopping
06:30
30m
Home shopping
07:00
30m
Home shopping
07:30
30m
Home shopping
08:00
1h
A case in which a woman went missing after breaking up with her boyfriend
09:00
1h
The disappearance of a young pregnant woman
10:00
1h
A 25-year-old cold case file that many saw as a tragic miscarriage of justice
11:00
1h
The murder of author Helen Bailey
Daytime
12:00
1h
A man's fascination with Idaho hairstylist Makaela Zabel-Gravatt
13:00
1h
How a Florida family was torn apart when a mother went missing
14:00
1h
A mother found dead on the side of a rural stretch of highway
15:00
1h
Experts analyse a man's deception following the 2017 Manchester Arena attack
16:00
1h
A bitter family argument
17:00
1h
The murder of Stephanie McClurg
Tonight's Highlights
18:00
1h
The story of Matt and Nique Leili
19:00
1h
The case of Debbie Flores Narvaez
20:00
1h
Teen mum Cheyenne finds acceptance in a new crowd
21:00
1h
The murder of Cambridgeshire 10-year-olds Holly Wells and Jessica Chapman
22:00
1h
A private investigator suddenly goes missing
23:00
1h
In rural Pennsylvania, a home refurb reveals a skeleton in the basement