What Lies Beneath

What Lies Beneath
Broadcast Information
Premiere date	April 3, 2018
Written by	Alex Schemmer
Directed by	Amanda Row
Episode GuideSeason Three 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22
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What Lies Beneath is the third episode of the third season of Shadowhunters: The Mortal Instruments.

Synopsis

The Shadowhunters try to track down the new imposing threat, while Jace has a suspicion that Jonathan is back and behind the mundane attacks. Simon tries to figure out what the Seelie Queen did to him during his time in the glade. Alec decides to host a Lightwood family dinner at Magnus' house after a surprising visit from Maryse.

Credits

• Cast

Starring:

• Katherine McNamara as Clary Fairchild
• Dominic Sherwood as Jace Herondale
• Alberto Rosende as Simon Lewis
• Matthew Daddario as Alec Lightwood
• Emeraude Toubia as Isabelle Lightwood
• Alisha Wainwright as Maia Roberts
• Isaiah Mustafa as Luke Garroway
• Harry Shum Jr. as Magnus Bane

Guest-starring: Will Tudor as Jonathan Morgenstern David Castro as Raphael Santiago Noah Danby as Russell Anna Hopkins as Lilith Alexandra Ordolis as Ollie Nicola Correia-Damude as Maryse Lightwood Tessa Mossey as Heidi McKenzie Genevieve Kang as Morgan Young

Co-starring: Brooks Darnell as Charlie Cooper Rosalba Martinni as Rosa Santiago Josh Horvath as ND Vampire

Multimedia

See more here

Videos

See more here

TMI 3x03 Promo Preview

TMI 3x03 Sneak Peek 1

TMI 3x03 Sneak Peek 2

Images

See more promotional images here and stills here

Music

A list of the known songs and score music featured in this episode:

• "Charmer" - DJ Brownie
• "On and On" - Dr. Fresch
• "In Reverse " - Sun Me
• "Till the Lights Go Out" - Jon Zott
• "Sentinel" - PIERS BARON
• "Miami Showdown" - Digitalism

Trivia

• Filming began on September 13, 2017.
• This is the last episode to feature Will Tudor as Jonathan Morgenstern (aside from appearing through archival footage in Erchomai). From Lost Souls onwards he is replaced by Luke Baines.