Gilles MingassonAbbott Elementary is known for its superb guest stars, and Season 3 maintains that reputation. From Taraji P. Henson and Ayo Edebiri as Janine’s (Quinta Brunson) family members to Leslie Odom, Jr. playing an evil former Abbott student, the show has featured a wide array of superstars in fun new roles—but the show might’ve outdone itself in this most recent episode with four huge guest stars packed into one half hour.Monday’s news that Sabrina Brier—a comedian known for posting hu