|Birthname:||John Christian Ruppenthal|
|Born:||June 1, 1955|
|Birthplace:||Coral Gables, FL, U.S.|
|Appears on/involved with:||Quantum Leap (TV series)|
|Job on series|
|Appeared as:||Joshua Ray in "The Boogieman" (Season 3)|
John Christian "Chris" Ruppenthal (born June 1, 1955) served as as a producer/co-producer of 64 Quantum Leap episodes, and also wrote ten in the series. He also played the part of leapee Joshua Ray in "The Boogieman" in Season 3 (episode #5).
Born and raised in Coral Gables, Florida, Chris received an A.B. Degree from Harvard University in 1976 where he was an Editor of the Harvard Lampoon as well as a member of The Delphic Club and The Hasty Pudding Club, where he performed in three of the famous Hasty Pudding travesty musicals.
Following graduation from Harvard, he worked for a time in New York City in advertising before moving to California to pursue a writing career. He received an M.A. degree from the USC Film School. 
Amongst his vast resume as a television producer, Ruppenthal has served as a co-executive producer of The Outer Limits and Silk Stalkings (which he also wrote scripts for) TV series, also as supervising producer of ABC-TV's Lois and Clark: the New Adventures of Superman (of also he wrote episodes for), CBS-TV's Touched by an Angel, Harts of the West and Covington Cross. He also has writing credits for Blade: The Series, Avalon: Beyond the Abyss, NBC's The Pretender, FOX-TV's The X-Files, CBS-TV's Touched by an Angel, Harts of the West, The Adventures of Brisco County Jr., Covington Cross, ABC-TV's Moonlighting, Sledge Hammer! and Max Headroom. 
Episodes written by ChrisEdit
- "Good Morning, Peoria" (Season 2)
- "Animal Frat" (Season 2)
- "Freedom" (Season 2)
- "The Curse of Ptah-Hotep" (Season 2)
- "Glitter Rock" (Season 3)
- "One Strobe Over The Line" (Season 3)
- "The Boogieman" (Season 3)
- "Hurricane" (Season 4)
- "The Last Gunfighter" (Teleplay with Sam Rolfe) (Season 4)
- "Roberto!" (Season 4)
- "Southern Comforts" (Season 3)
Ruppenthal currently resides in Los Angeles, where he continues to write for television and Works for LAUSD at Berendo Middle School in (the Pico-Union District)and the UCLA Extension School.