Star Trek: The Original Series season 1, episode 5, "The Enemy Within," saw a transporter accident duplicate Captain Kirk into good and evil halves.

Geordi La Forge Briefly Served As Helmsman In TNG Season 1 After Geordi La Forge's brief stint as helmsman of the USS Enterprise-D, Star Trek: The Next Generation cycled through several different ...

This was standard practice two centuries earlier in the "Star Trek: Enterprise" era, though we don't recall Archer, T'Pol, and Tucker enjoying the application of the goo quite as much as Ransom.