CALEB
RJ Brown
Brought on board to help Tony (Christian Navarro) with his anger management, hunky boxing trainer Caleb becomes a sturdy shoulder for the angsty high schooler to lean on.
CHLOE
Anne Winters
The new cheerleading captain is thrilled to be the latest girlfriend of wealthy and influential jock Bryce (Justin Prentice). But will she stand by her man as the allegations mount against him?
COACH RICK
Ben Lawson
The Australian star of Designated Survivor plays the latest recruit seen on the Liberty High faculty, laying down the (not necessarily just) law to the unenlightened boys of his sports teams.
NINA
Samantha Logan
When a traumatised Jess (Alisha Boe, above right) returns to Liberty, she finds a new friend in Nina (left), who has dark secrets of her own. Here's hoping Jess treats Nina better than Hannah.
JUDGE CAMPBELL
Richard Gross
Much of the non-school set action in Season 2 takes place in the courtroom, where the presiding judge (centre) is a man of few words. Before him, prosecutor Vasquez (Wilson Cruz) interrogates Bryce.
JACKIE
Kelli O'Hara
Hannah's mother, Olivia (Kate Walsh, centre, with Cruz), is determined to pursue the case against Liberty High, despite financial and personal pressures to give in. But she finds zealous support from fellow grief-stricken mum Jackie.
SCOTT
Brandon Butler
He may be a previously unseen member of the letterman jacket boys' club, but it's a club Scott's not sure he wants to belong to. Does team loyalty mean turning a blind eye to their bad behaviour?
CYRUS
Bryce Cass
Hooray! Socially awkward Tyler (Devin Druid, right) gets a friend, anarchist Cyrus, who has clever ways of getting back at the bullies and brings Tyler into a clique of his own.
MACK
Chelsea Alden
Bonus! Cyrus has a cute sister, Mackenzie, who seems to dig Tyler's quirky nature.
SARAH
Makenzie Vega
This character has some intriguing things to say about the kind of person Hannah was before she arrived at Liberty High.
BRYCE'S PARENTS
Brenda Strong and Jake Weber
Rarely seen, even by son Bryce, Nora and Barry Walker know how to flash the cash and live the high life, but will they back their son when they learn the true nature of the child they have (sort-of) raised?
ALEX'S MUM
Meredith Monroe
We met Deputy Standall (Mark Pellegrino), the dad of troubled Alex (Miles Heizer), in Season 1. But it's a real treat to find out that Alex's sugar-hating mum is played by Monroe. Her voice is instantly recognisable as Dawson's Creek's Andie McPhee, and her face hasn't changed that much either, 20 years on.
More on 13 Reasons Why: The Controversial Season 2 finale
Subscribe now to Binge List, WHO magazine's TV podcast. This week we ask whether Netflix’s 13 Reasons Why deserves all the hype and controversy. And is Riverdale too dark? What about teen series of years past – do Dawson’s Creek, Gossip Girl, The OC and Beverly Hills, 90210 still hold up? We answer all those questions and more as we delve into hit teen dramas past and present. Plus, we look at under-the-radar series Veronica Mars, Scream and The 100, and millennial mystery Search Party. Listen below, or on iTunes: http://po.st/syE3JF or OMNY: http://po.st/Uj6J8R