Tyler in the form that SG1 saw him and it's true form
|Played By:||Dion Johnstone|
Tyler, a Reole excreted a natural substance to disguise himself, whilst hiding from the Goa'uld who were searching for him. Whilst running from the Goa'uld, Kaiael came across SG1, and used the substance to make them believe he was in fact a member of SG1 named Lieutenant Tyler.
Whilst, Samantha Carter, Teal'c and Daniel Jackson managed to escape, Tyler and Jack were lift behind. Surprised at how O'Neill risked his life, and still wouldn't leave Tyler behind, Tyler revealed the truth to Jack about who he is, however Jack remained adamant that he does not leave men behind.
When the rest of SG1 came back, they told Jack that he wasn't who he appeared to be, however he already knew. In an attempt to save the lives of SG1, Tyler gave himself up, however he was soon released when SG1 saved him, telling him to go through the gate and to bury the gate.