Mr. Triangle Sr./Appearances

Here is a list of episodes in which Mr. Triangle Sr makes an appearance.
==Season 3==
*10. There's Three Sides to Every Story (speaking debut; flashback)
==Season 4==
*4. Unpresidented Fate
*10. Untying the Knot (non-speaking; flashback)
==Season 5==
*9. B.E.L.U.G.A.
*10. The C Word
*19. Gregory Triangle
*20. The Battle of the Bootes Void
== Season 6 ==
* 3. Monsterless (flashback)
* 6. 5 Years of Snowtab (on-video; non-speaking)
* 7. Tuxtab Gets an 'F' (non-speaking)
==Other==
*SITV Presents: Tabsentia