Credit: Video Still

Ashley Marin is clearly hiding something on Pretty Little Liars, but Hanna (Ashley Benson) doesn't care: She'll do anything to protect her mom. Could that wind up landing her in trouble? Caleb seems to think so in this sneak peek of Season 4, Episode 4: "Face Time" (July 2).

This clip begins with Caleb leading Hanna away from Detective Holbrook's partner, who's in town this week. He warns Hanna that Holbrook and Co. aren't like the Rosewood PD goofs — they're the real deal, and she needs to be careful. Hanna insists she'll do "whatever it takes" to protect Ashley, but Caleb is more cautious. And Holbrook's partner? She's got her eyes on them the whole time.

Here's the official synopsis of the episode:

Holbrook’s partner, Lt. Tanner, comes to town, intensifying their investigation into the Liars and their possible connection to Wilden’s death. Emily panics when her parents come under undue scrutiny due to “A’s” manipulations. Hanna bristles when Caleb tries to help her through this latest crisis, and tries to shift the focus of the police investigation. And Toby finds a new source of information into his mother’s death, but it only leads to more questions.

Check it out below.

Credit: YouTube Photo: Pretty Little Liars Sneak Peek: Hanna and Caleb on Season 4, Episode 4 (VIDEO)

Find more Pretty Little Liars spoilers here.

Catch the episode of Pretty Little Liars on Tuesday, July 2, 2013 at 8 p.m. ET/PT on ABC Family.

Rebecca Martin is an editor at Wetpaint Entertainment. Follow her on Twitter @BeccaDMartin.