Jace brings Clary to a bar to show her how to identify vampires and to steal one of their motorcycles in episode 1x03 "Dead Man's Party". The team returns to find Magnus Bane in episode 1x04 "Raising Hell".
The Shadowhunters sneak into the Hotel DuMort through a back entrance hidden in an old meatpacking plant to rescue SImon in episode 1x03 "Dead Man's Party".
The team tracks Magnus down to his hideout only to find it under attack by The Circle in episode 1x04 "Raising Hell".
Clary and Simon are taken to the werewolf hideout in episode 1x05 "Moo Shu to Go". The restaurant is attacked by The Circle in episode 1x08 "Bad Blood". Simon and Luke talk about the werewolf/vampire feud in episode 1x10 "This World Inverted". Appears in 14 more episodes.
Clary and Alec meet Simon near Clary's apartment in episode 1x05 "Moo Shu to Go".
Jace and Simon head to a dealer for the supplies needed to save Luke in episode 1x06 "Of Men and Angels".
Jace talks on the phone while walking with Simon in episode 1x06 "Of Men and Angels".
The group escapes into the tunnels near the police station and run from creatures in episode 1x07 "Major Arcana".
Clary applies a new tattoo to prevent the Clave from tracking her in episode 1x09 "Rise Up".
Simon pretends to be the demonic killer to throw the internal affairs officer off Luke's case in episode 1x10 "This World Inverted".
Jace calls Clary on the phone and tries to warn her about Valentine in episode 1x13 "Morning Star".
Jace interrogates Hodge to try to get Valentine's location in episode 1x13 "Morning Star".
Alec and Isabelle head to a fight club to lay a trap for Valentine's hunters in episode 2x02 "A Door Into the Dark".
Maia Roberts and several other members of the pack stop Jace near Magnus's loft and prepare to kill him in episode 2x03 "Parabatai Lost".
Alec thinks back to his time training with Jace before their Parabatai test in episode 2x03 "Parabatai Lost".
Luke convinces the normal cops to leave while the Shadowhunters investigate the demon murder in episode 2x04 "Day of Wrath".