Episode 67 of "Sliders"
s04e19 My Brother's Keeper
Title: My Brother's Keeper
Original Air Date: 04/02/1999 on Sci-Fi Channel
Director: Reza Badiyi
Writer: Doug Molitor
Guest Stars: David Kallaway (Guard One), Bob Morrisey (Bill Pappas), Malcolm-Jamal Warner (R.J.), John Walcutt (Dr. Michael Mallory), Ross Borden (Doctor), Paula Trickey (Nurse Lauren Perry), Reba Shaw Alexander (Clerk), David Flynn (Brad)
Plot Outline:
The Sliders arrive on a world where clones are harvested for spare body parts. Quinn's double is blinded in a lab accident and when Quinn tries to help, he is mistaken for a clone. Meanwhile, the others inadvertently rescue the clone, which Colin tries to teach the importance of family and sacrifice.