Binge The 'Mark Of A Serial Killer' Marathon This Weekend On Oxygen

Featuring firsthand accounts from investigators and forensic psychology experts, each episode of Oxygen's "Mark of a Killer" dives into the trademarks and signatures left behind at crime scenes by murderers.

As the series illustrates, these calling cards become crucial factors in identifying the killers and ending their reigns of terror. And this August, Oxygen is airing seven episodes from "Mark of a Killer" that look back on the mementos of some of the most horrific serial killers in U.S. history.

Tune in starting August 1 to watch the "Mark of a Serial Killer" marathon, and check out the schedule below.

"Killer Caller" airs Saturday, August 1 at 10 p.m. ET

Twin Cities, MN police are hunting for a killer caller who confesses to a string of murders in a chilling, high-pitched voice, begging for forgiveness. No one can identify him until one woman survives a brutal attack.

"Deadly Summer" airs Saturday, August 1 at 11 p.m. ET

In the summer of 1976, the NYPD are chasing a man shooting at couples in parked cars with a gigantic .44 caliber handgun. He taunts the city with terrifying letters until police get a lead about a suspect who has shot a neighbor’s dog.

"Deadly Design" airs Sunday, August 2 at 12 a.m. ET

Brooklyn shop keepers are afraid of closing time as a killer shoots his victims while they're locking up their stores. Police release surveillance footage to the press and ask the public for help to find a duffle bag-wielding murderer before he strikes again.

"The Smell of Death" airs Sunday, August 2 at 1 a.m. ET

A rash of young men go missing around Chicago during the 1970s. When bodies start washing up in the river, a pattern emerges. A small piece of evidence leads police to the house of a model citizen where his furnace puts the suspect in the hot seat.

"Hunted to Death" airs Sunday, August 2 at 8 a.m. ET

Police have found a string of murdered women in shallow graves in very remote areas of the Alaskan wilderness. After months of searching, police zero in on a local family man who’s been living a double life that no one suspected.

"Collar and Leash Killer" airs Sunday, August 2 at 9 a.m. ET

A string of women are found dead by the side of the road with a unique ligature that looks like a dog collar and leash. Detectives are stumped until a 17-year-old girl manages an escape from a vicious kidnapper, leading police to a serial killer.

"Killer Athlete" airs Sunday, August 2 at 10 a.m. ET

The I-5 corridor in California is taken over by a brazen bandit who terrorizes the highway with a blitz of assaults and murders. The only clue to the identity of the killer is a specific athletic tape used to bind his victims.

Can’t wait to watch, but unsure how to tune in? Scroll below to find out how to stream "Mark of a Serial Killer."

Episodes of “Mark of a Serial Killer" can be viewed on the Oxygen app, which is available on iOS and Android. To sign in, you just have to enter your cable, digital, or satellite TV subscription information.

Even if you don't have a subscription, the app offers three free credits so you can watch without signing in.

New episodes are available on the app the day after they air.

If you’re unsure which channel Oxygen is on, just use our Channel Finder.

Want to watch the event live, but don't have a cable subscription? Oxygen series are available to stream on services like Sling TV, Hulu Live TV, YouTube TV, and more.

All you need is an internet connection and subscription to one of the above.

It's just as easy to watch episodes on your TV as it is on your device. 

Oxygen shows are available on AppleTV, Amazon Fire TV, and Roku, and you can also stream episodes through Chromecast.

Need to purchase individual episodes? They're available on iTunes, Amazon, Vudu and Google Play.

You can also stream episodes and specials on Oxygen.com.

Just click on whichever episode you want to watch and enter your TV subscription info.