A Starfleet officer afflicted by a bizarre space malady who, aboard a Division 14 transport in 2380, convinces his fellow patients that the promised medical retreat called the Farm is a lie.
Osler appears in the Lower Decks episode Much Ado About Boimler. He is one of the passengers on a dark, unsettling Division 14 ship that collects Starfleet personnel suffering from freakish and seemingly incurable accidents and carries them to a facility known as the Farm.
When Brad Boimler, stuck out of phase after a transporter mishap, and Tendi, with her genetically engineered dog, come aboard, Osler tells them that the Farm does not exist and that the patients are simply being hidden away for good. He rallies the others into a mutiny against the ship's Edosian specialist, which Boimler undermines once his own condition clears up.
Osler turns out to be wrong. The Farm is real, a luxurious resort world where the patients are cared for, and he ends the episode enjoying it with the rest.