- Stony Blyden as Max Hunter
- MaeMae Renfrow as Tess Hunter
- Daan Creyghton as Sal Hunter
- Thomas Jansen as Daniel Hunter
- Kyra Smith as Anika Hunter
- Barnaby Savage as Tim
- Debra Mulholland as Dolly/Hedwig Hunter
- Geerteke van Lierop as The Ghost of Josephine
- Billy Holly as Spooky Pete
- It is revealed that Dolly pretends to be a cleaning lady to sneak in and to get what is hers.
- Anika finds the cleaning lady as suspicious, she seems familiar to Anika, but she can't make out who she was at first.
| To view the The Key gallery, click here.
|Hunter Street Episodes|
|The New Hunter • Saganash • The Secret Room • Principal • Rinus • The Key • The Blue Diamond • MGP • Aunt Hedwig & Uncle Eugene • Contact • The Relatives • The Red Diamond • Cassandra's Map • Anika's Birthday • The Maze • Undercover • Sophie • Bruhl • Almost Back • The Deed|
|The Package • The Arrest • Max • Evie • The Museum • The New Friend • The Family Tree • Payback • The Plan • The Reverse Heist • The Mole • The Green Mask • Hacker Hideout • The Super Secret Room • The Crown • Hide and Seek • The Houseboat • Spy • The Ritual • Hunters Forever|