The following characters are from the planet M5S-224 in 1x09 "Home."

• The "fog" aliens

The following characters are from the unnamed village in 2x07 "Instinct."

• Callum
• Goran
• Zaddik
• Ellia

The following characters are from Ford's gang in 2x10 "The Lost Boys."

• Kanayo
• Jace

The following characters are from the world in 2x15 "The Tower."

• Otho
• Lord Protector
• Eldred
• Mara
• Tavius
• Baldric
• Petra

The following characters are from two separate races in 2x16 "The Long Goodbye."

• Phoebus
• Thalan