Episode no. "Safe" is the fifth episode of the science fiction television series Firefly created by Joss Whedon. The episode is noteworthy for being the television debut of actor Zac Efron, who appears in flashback as the young Simon Tam. ...

Who plays the doctor in Firefly?

Doctor Simon Tam, played by Sean Maher (and in a flashback by Zac Efron), appears in all episodes of Firefly, the feature film Serenity, and the Serenity comics. Simon was born in late November, c. 2490 to Gabriel and Regan Tam, and was born and raised on Osiris, a Core World planet with major Alliance ties.

Who played Simon Tam?

Pleasantville, New York, U.S. Sean Maher (born April 16, 1975) is an American actor. He is known for his portrayal of Simon Tam in the science fiction television series Firefly and follow-up movie Serenity.