Martin's latest machine effects a mind swap with Mrs. Brown.

A short circuit in Martin's transmitter puts him and Tim on nationwide TV.

In a department store, Martin is frozen into a mannequinlike pose.

Tim's I.Q. soars when he downs Martin's brain-power pills.

Trouble begins when Martin's Martian nephew lands on Earth and tells everyone where he's from.

Trouble begins when Tim contracts a Martian virus.

A mineral deficiency gives Martin the Midas touch everything he touches turns to gold.

An invisible Martin is photographed capturing an escaped criminal.

Martin turns himself into a liquid and is lapped up by Tim's dog.

Martin's personality altercator turns Mrs. Brown into a thief.

Martin's benevolence-inducing light has an unusual effect on Brennan.

Martin accidentally pulls an alien spaceship out of the sky.

Double trouble - Martin's duplicating machine creates two Tims.

Rumors spread that Martin is working on a secret Government project.

A mosquito bite causes Martin to act like a race horse.

A time machine plummets Tim and Martin back to the Gold Rush Days.

Tim and Martin search for their time machine.

Tim and Martin return, via time machine, to early Hollywood where Martin once starred as a sheik.

Uncle Martin captures a surprising photo of Tim using his fortune-telling camera. Both are astonished when the image reveals Tim at the altar with an unidentified woman whose back is turned to the camera.

The time machine brings Tim, Martin and Mrs. Brown face to face with Jesse and Frank James.

Disguised as a 70-year-old, Martin becomes a night watchman.

A Martian pill turns Mrs. Brown into a crusading crime-fighter.

Tim is arrested for theft when he's forced to help two jewel robbers.

The unexplained presence of "Uncle" Martin jeopardizes Tim's claim to an inheritance.

Martin helps Mrs. Brown's brother build a robot that does household chores.