Caleb Roberts

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Caleb Roberts is a shy transfer student from a military family. He wants to be an author, and thus writes many different short stories and poems. Caleb is aloof and is reluctant to join the Silo team at first. Caleb is often impulsive and frequently gets himself in dangerous situations. He gets himself trapped in an abandoned subway tunnel, tied up by a maniacal stunt actress, and is nearly assaulted by a street gang when he enters their headquarters. Rob has a strained relationship with his father, who wishes Caleb played more sports instead of writing. Caleb's family decides to move to Australia during the "Lost in North Valley" case, and Caleb's place in the team is assumed by Marco.

Major cases for Caleb include

 * "To Catch a Creep": Caleb is introduced as a suspect, but later "sees" Silo.
 * "Into the Comics": After winning the comics contest, Caleb joins the team.
 * "To the Light": In searching for his homeless friend Double T, Caleb is trapped in a subway tunnel.
 * "Danger on Ice": Caleb falls for a skater.
 * "Building Bridges": Caleb becomes friends with a former gang member and is attacked in their hideout.
 * "Get the Message": Works with Taylor to get the team back together and prevent Silo from fading away after the discord within the team.
 * "Lost in North Valley": Caleb's last case, moves to Australia.