A scientist with a shadowy past that's tied into the Roswell cover-up, Dr. Mentnor was the man who initially conceived the Backstep project.
Appearances
7 Days
Main cast, played by Norman Lloyd
- Episode 1x01: Pilot: Part 1 (Oct 7, 1998)
- Episode 1x02: Pilot: Part 2 (Oct 7, 1998)
- Episode 1x03: The Gettysburg Virus (Oct 14, 1998)
- Episode 1x04: Come Again? (Oct 21, 1998)
- Episode 1x05: Vows (Oct 28, 1998)
- Episode 1x06: Doppleganger: Part 1 (Nov 4, 1998)
- Episode 1x07: Doppleganger: Part 2 (Nov 11, 1998)
- Episode 1x08: Shadow Play (Nov 18, 1998)
- Episode 1x09: As Time Goes By (Nov 25, 1998)
- Episode 1x10: Sleepers (Dec 16, 1998)
- Episode 1x11: HAARP Attack (Jan 27, 1999)
- Episode 1x12: Last Card Up (Feb 3, 1999)
- Episode 1x13: Last Breath (Feb 10, 1999)
- Episode 1x14: Parkergeist (Feb 24, 1999)
- Episode 1x15: Daddy's Girl (Mar 3, 1999)
- Episode 1x16: There's Something About Olga (Mar 31, 1999)
- Episode 1x17: A Dish Best Served Cold (Apr 21, 1999)
- Episode 1x19: EBE's (May 12, 1999)
- Episode 1x20: Walter (May 19, 1999)
- Episode 1x21: Lifeboat (May 26, 1999)
- Episode 2x01: The Football (Sep 29, 1999)
- Episode 2x05: Two Weddings and a Funeral (Nov 3, 1999)
- Episode 2x06: Walk Away (Nov 10, 1999)
- Episode 2x10: The Devil and the Deep Blue Sea (Jan 5, 2000)
- Episode 2x11: Time Gremlin (Jan 12, 2000)
- Episode 2x12: Buried Alive (Feb 9, 2000)
- Episode 2x15: Space Station Down (Mar 1, 2000)
- Episode 3x04: The Dunwych Madness (Nov 1, 2000)
- Episode 3x06: Deloris Demands (Nov 15, 2000)
- Episode 3x09: Top Dog (Jan 3, 2001)
- Episode 3x15: Crystal Blue Persuasion (Feb 28, 2001)
- Episode 3x16: Empty Quiver (Mar 21, 2001)
Guest cast, played by Norman Lloyd
- Episode 2x16: The Cuban Missile (Mar 22, 2000)
- Episode 2x17: X-35 Needs Changing (Apr 5, 2000)
- Episode 2x18: Brother, Can You Spare a Bomb? (Apr 19, 2000)
- Episode 2x19: Pope Parker (Apr 26, 2000)
- Episode 2x20: Witch Way to the Prom (May 3, 2000)
- Episode 2x21: Mr. Donovan's Neighborhood (May 10, 2000)
- Episode 2x22: Playmates and Presidents (May 17, 2000)
- Episode 2x23: The Cure (May 24, 2000)