October 4, 1969
A colleague's death leads Mannix into a dubious investigation.
Episode 3
Return to Summer Grove
October 11, 1969
Old home week, as Mannix looks into a murder and tries to make up with his father.
Episode 5
A Question of Midnight
October 25, 1969
Mannix reopens a malpractice case against opposition.
Episode 6
A Penny for the Peep Show
March 28, 1970
Three thugs hold Mannix, Peggy, and a woman hostage, claiming they want the $312,000 she has in a briefcase at home, but they may be after something even more valuable.
Episode 9
The Nowhere Victim
November 29, 1969
A hit-and-run case lands Mannix in the middle of a gang war.
Episode 11
Who Killed Me?
December 13, 1969
The attempted murder of an executive leads Mannix to several likely suspects.
Episode 15
Walk With a Dead Man
January 10, 1970
A wealthy man hires Mannix to find the person blackmailing him—eventually leading to Mannix being suspected of murder.
Episode 16
A Chance at the Roses
January 17, 1970
Eyewitnesses peg Mannix's client, but the victim isn't what he seems, either.
Episode 17
Blind Mirror
January 24, 1970
A domestic quarrel, and a missing secretary, make for a confusing case—“Rashomon”-style.
Episode 18
Harlequin's Gold
January 31, 1970
Mannix tries to locate an heir, who is brought into danger by the attention.
Episode 19
Who is Sylvia?
February 7, 1970
A murder in the offing implicates an old army chum, but the victim's identity is uncertain.
Episode 20
Only One Death to a Customer
February 14, 1970
Mannix has an enemy who seems to be dead.
Episode 21
Fly, Little One
February 21, 1970
The strange utterances of a disturbed young girl are clues in a case of robbery and murder.
Episode 22
The Search for Darrell Andrews
February 28, 1970
A colleague's death leaves Mannix with the evidence he was murdered for.
Episode 23
Murder Revisited
March 7, 1970
A TV host's murder proves difficult to investigate, as everyvbody wants it canceled.
