The former Beverly Hills, 90210 star will tackle reports her partner was caught cheating in her upcoming show, True Tori.
The six-part run will begin with MCDermott leaving a rehab facility, which he checked into to deal with "personal issues" after the scandal broke.
A statement from America's Lifetime network bosses reads: "Tori has made the courageous decision to allow the audience to witness the most difficult and unpredictable period in her life.
"Intimate, raw, emotional and completely real, Tori will tell her story for the first time as it should be told - by her. Since viewers will be seeing events almost immediately after they occur, nobody knows how the drama will unfold - not Tori, not Dean - and only time will tell if Tori and Dean’s marriage survives."
Spelling and MCDermott, who have been married for seven years, have four children, all under the age of six. They have documented their home lives in reality Tv shows since 2007.
True Tori is set to premiere in the U.S. on 22 April (14).