Leland (Tobin Bell) is the head of an organization called “Codex”. He usually stays behind the curtain.
After the events in the Season 3 Finale, the Phoenix Foundation was disbanded and the team members were stripped of their high-level clearances. In Episode 4×01 (Fire + Ashes + Legacy = Phoenix), Russ Taylor (Henry Ian Cusick) is the new owner of Phoenix who convinces Angus MacGyver (Lucas Till) to get the team back together. During the first few episodes, they encounter an organization called “Codex”.
Matty Webber (Meredith Eaton) contacts James MacGyver (Tate Donovan) in Episode 4×07 (Mac + Desi + Riley + Aubrey); talking to him about her suspicions of James’ sister-in-law Gwendolyn Hayes (Jeri Ryan) still being alive and involved with Codex.
In Episode 4×08 (Father + Son + Father + Matriarch), Gwen captures both MacGyver and James. She tries to convince her nephew to join Codex and “reset the world” together, but he refuses. At the end of the episode, James sacrifices himself so MacGyver can escape. Gwendolyn, Scarlett (Amber Skye Noyes) and the Codex mercenaries with them pack shop and relocate.
In Episode 4×10 (Tesla + Bell + Edition + Mac), Scarlett and her team is sent to retrieve items left by Nikola Tesla. Following Team Phoenix into a mine, her team is stunned by Tesla’s weapon Shiva, but she is able to escape.
When trying to break out Codex member “The Merchant” (James Callis) who’s being held at Phoenix in Episode 4×11 (Psy-Op + Cell + Merchant + Birds), she is arrested and interrogated.
To make it look like he defected and joined Codex, MacGyver helps Scarlett breaking out in Episode 4×12 (Loyalty + Family + Rogue + Hellfire). With the help of Riley Davis (Tristin Mays), they retrieve Shiva and bring it into Codex’ headquarters.
In the Season 4 Finale (4×13: Save + The + Dam + World), Leland questions MacGyver and reveals to him that he once tried to recruit Russ Taylor. Leland is impressed by MacGyver, but later realizes that MacGyver is still loyal to Phoenix. He fears that her fondness for MacGyver might be too much of a distraction for Gwendolyn, so he wants MacGyver to be killed off. While Riley and Mac can escape, Scarlett and the other Codex members in the warehouse don’t. Gwendolyn is furious with Leland and sacrifices herself to prevent Codex from detonating a nuke inside a dam. Leland and the rest of the surviving Codex members disappear.
Reboot Series (recurring character)
4×13 Save + The + Dam + World