[5] The series centers on a pair of highly trained young adults, Delilah and Julius, who were both orphaned children of special agents.

Together, they graduated from the Academy, a training facility headed by Al, a free-spirited special agent who brought the duo together, and fight international crime and a myriad of villains as a pair of savvy, well-trained spies.

Delilah and Julius are depicted as multi talented, being gifted musicians, masters of disguise, martial arts experts, and fluent in 20 languages.

She appreciates having a capable partner in Julius, and together they will stop at nothing to keep the villains from carrying out their evil plots.

This confidence allows him to act on the fly and keep cool in the face of danger, though he tends to be a bit careless in calmer situations.

The director of the Academy, Al (Andy Bianchi) is always highly informed and gives Delilah and Julius their mission assignments.

A frequent partner of Delilah and Julius, Nosey (Robert Tinkler) is a well-meaning, good-hearted goof with a reputation for being a stink magnet.

Another one of Al's arranged spy teams, Ursula and Emmet are the rivals of Delilah and Julius who are jealous of their popularity and success.

Currently available sources do not fully identify which actors voiced most supporting characters; however, actors known to have had roles in the series include Denis Akiyama, Linda Ballantyne, Scott Beaudin, Robert Bockstael, Justin Bradley, Benedict Campbell, Drew Coombs, Neil Crone, Stacey DePass, Carlos Diaz, Novie Edwards, James Gallanders, Janet-Laine Green, Katie Griffin, Jamie Gutfreund, Tim Hamaguchi, Tracey Hoyt, Randy Hughson, C. David Johnson, Brittany Kay, Kim Kuhteubl, Julie Lemieux, Scott McCord, Marnie McPhail, Stephanie Anne Mills, Al Mukadam, Noah Plener, Jeff Pustil, Adam Reid, Andrew Sabiston, Tyrone Savage, Alison Sealy-Smith, Colette Stevenson, Susan Quinn, Rachel Wilson, Danny Wells, Maurice Dean Wint and Noam Zylberman.

Originally, the show was aimed at the teenage girl demographic with a very different concept for the main characters, "a brawn-and-brains husband-and-wife team of self-made millionaires".

[16] Special features include character biographies, a spy gadget gallery, and the original English-language script for the pilot episode "The Underground".

[9] The series was one of the top-rated shows on the English-language Teletoon in May 2006,[18] and the 10th most popular original production on the French-language Télétoon as of October 2007.

[2] Kidscreen compared the show to Totally Spies!, another Teletoon original, but with "a more sophisticated sense of humor focused on relationship-building" aiming for an older audience.