Can you keep a secret? These TV characters can!

"Secrets, secrets are no fun; secrets, secrets hurt someone." It's a childhood refrain that many of us heard from our parents or our teachers, but there is one place where this saying just isn't true: on TV!

Some of the most enjoyable shows on TV wouldn't be possible without a big secret at the center of it all. From comedies to teen dramas, these shows work thanks to the characters who can keep a secret, season after season.

Gus and Henry, "Psych"

Gus and Henry know that Shawn is lying about his "psychic gifts" from the get-go. And while they both gave Shawn a hard time about his business in earlier seasons, they both support him and keep his secret. After all, with Shawn putting so many criminals behind bars, the lie is being told for the good of the community.

Funny enough, Gus and Henry aren't the only ones who have learned Shawn's secret and kept it safe. Declan learned it, as did English Tears for Fears frontman Curt Smith.

The girls of "Pretty Little Liars"

There would be no drama (and thus no show) if Aria, Hanna, Emily, and Spencer simply told the truth. The girls are great at keeping secrets, but keeping those secrets is often detrimental to their personal lives. Case in point: In Season 3, the girls find a drunk and disoriented Emily beside the desecrated grave of Ali DiLaurentis. If the girls had just gone to the police right away, Emily probably would have gotten a tox screen, and it would have been obvious that someone drugged her. The girls wouldn't have to hide from the "New A," because the plot against them would have been exposed in Episode 1!

Deb (so far!), "Dexter"

Who knows Dexter's secret? Over the years, the list has included Harry Morgan, Lila Tournay, Trinity, Travis Marshall, Doakes, Lumen, Hannah, and Deb. But of these, only three are still alive: Lumen, Hannah, and Deb. Based on the rest of the list, either Hannah or Deb is likely to die soon: Learning Dex's secret doesn't usually mean you get to keep your life. Thankfully, Lumen got out of town years ago.

Pretty much everyone, "Warehouse 13"

When you become an agent at Warehouse 13, you are granted the ability to tell one person, and only one person, about your job. Claudia told her brother, and Mrs. Federic appears to have used her "one" to tell her grandson.

Pete's mom used her "one" for her husband, instead of Pete. Years later, Pete learned of his mom's involvement in the organization, but not from his mom's own lips.

You have to be good at keeping secrets to work at the Warehouse. The show has yet to explore what happens when a Warehouse agent tells more than one person about their job. Chances are, it's not good.