Picking up just weeks after the events of Alien Force , follows a sixteen-year-old Ben Tennyson as he navigates a world that finally knows his secret. This era of the franchise is defined by the Ultimatrix , a device that allows Ben to "evolve" his aliens into more powerful Ultimate versions to face higher stakes than ever before.
The concept of "Ultimate" forms serves as a metaphor for Ben's maturity. However, the show subverts this in Season Two by revealing the Ultimate forms are sentient and have essentially been tortured. Ben must acknowledge that power comes with a cost. ben ten ultimate alien all episodes
27. "The Purge" 28. "Simian Says" 29. "Greetings from Techadon" 30. "The Flame Keepers' Circle" 31. "Double or Nothing" 32. "The Perfect Girlfriend" 33. "Ultimate Sacrifice" 34. "The Widening Gyre" 35. "The Mother of All Vreedles" 36. "A Knight to Remember" 37. "Solitary Alignment" 38. "Inspector 13" 39. "The Enemy of My Frenemy" 40. "Couples Retreat" 41. "Catch a Falling Star" 42. "The Eggman Cometh" 43. "Night of the Living Nightmare" 44. "The Beginning of the End" 45. "The Ultimate Enemy" (Parts 1 & 2 — double-length finale) Picking up just weeks after the events of