Zoonie's talent for mimicry gets the XL5 crew out of a tight spot when they investigate the disappearance of Fireball XL2 and find themselves menaced by a space monster.

Intro special guest: Sarah Cronin

Harry must protect a South American diplomat from rivals who are trying to kill him.

Intro special guest: Sarah Cronin

After civilian test pilot Paul Foster is caught in a UFO incident, he persistently strives to expose the truth.

Intro special guest - Bob Ayres

Joe poses as the heir to a Middle Eastern throne as WIN tries to rescue the real prince from kidnappers allied with a jealous regent.

Intro special guest: Sharon Mansfield

Supercar takes to the road to catch a thief.

Intro special guest: Sharon Mansfield

The automated Earth space probe Voyager One is approaching the Moon. With the radioactive exhaust from its engine certain to extinguish all life on Moonbase, the Alphans try to gain control and shut down the drive. Help comes when the probe's designer is found living on Alpha under an assumed name. However, Voyager is being followed by alien ships seeking revenge.

Intro special guest: Christien Anholt

The Mysterons launch a series of crippling attacks on the Frost Line Outer Space Defence System in Canada.

Intro special guest: Jack Klaff.

Tex is called away and lends his magic guns to Little Jake, who soon finds himself way over his head.

Intro special guest: Jack Klaff