A knack for solving mysteries—check. Bossy tendencies and borderline OCD—check. An impeccable hat collection—check. Spencer Hastings, played by 26-year-old Troian Bellisario, is the foursome’s unfaltering lead pseudo-detective whom they trust to piece together the clues and dole out witty one-liners.

In fact, her rather adult humor, a cross between Julia Louis-Dreyfus on Veep and Sarah Silverman without the poop jokes, keeps the show from being so serious that the series itself becomes laughable.