[Doomsday]

Actually the events in Time Force were caused by Alex himself. Originally, Alex led the team to the past. But everyone died except himself. Alex blamed himself and desperately wanted Jen back. So he arranged for his DNA to be implanted into Mrs. Collins to produce Wes. Who was designed to be his replacement. He also made it possible for Eric to become the Quantom Ranger. This resulted in a new timeline with a new Alex that is the one that dies in "Force From The Future". The original Alex used further time travel to cement himself as the unseen head of Time Force. Until after the Rangers are in the past and he reveals himself to Logan.

The plan started to go to hell when Doomtron was created and the timeline started to change again due to the Time Force's actions. Alex began to think of Wes as a faliure and for softening up the Time Force team. When he was supposed to acclimate them to the past and make them stronger in the process. So Alex went back in time during the destiny arch to take command himself. Getting rid of Wes by making him think he had to take over for Mr. Collins. Due to Wes's actions and successful destruction of Frax's Zord, Alex realized Wes was doing his job and should be left in place. Collins was healed because Biolabs neded him or Wes to run it. Bio labs was important for the future.

Alex reverted to the previous plan which invovled the sacrifice of Wes and Eric's injury. The original Time Force Rangers were recalled to make sure they were saved. But all this ended when Jen made her decision to return to help Wes. Thus resulting in an entriely new timeline where the future is much less fascist. Alex Prime lost all his behind the scenes power but "Force From the Future" Alex is still dead.. Thats why Jen still has to overcome her mistrust of Ransi k in "Reinforcements From The Future. Or at least demonstrate it in that scene where she takes Ransik's hand.