Tim tampers with history when he goes back in time and talks the Indians out of selling Manhattan.

Martin's molecular reassembler turns a squirrel into a human.

A beam from Martin's regenerator gives Mrs. Brown power to foresee the future.

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

Martin summons Leonardo da Vinci for help in fixing his spaceship.

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

Trouble begins when Tim contracts a Martian virus.

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

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

A gypsy curse causes Mrs. Brown to drop anything she picks up.

Tim is kidnapped by sinister CRUSH agent Butterball.

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

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

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

An invisible Martin is photographed capturing an escaped criminal.

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

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

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

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

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

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

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

Martin accidentally pulls an alien spaceship out of the sky.

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

Uncle Martin, packed in a tiny bottle, is bound for the Middle East.

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

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

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

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.

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

Tim and Martin search for their time machine.

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