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A teenager whose parents are out of town for a week, a French vampire, a young Navy lawyer

Tom Cruise. Cruise's characters are Joel Goodson from 'Risky Business', Lestat de Lioncourt from 'Interview with the Vampire', and Lt. Kaffee from 'A Few Good Men'.

Santa Claus, a bumbling handyman and TV show host, an actor who played a starship captain

Tim Allen. Allen played Santa Claus in 'The Santa Clause', Tim Taylor in 'Home Improvement' ('Tool Time' was the show within the show.), and Jason Nesmith (Commander Taggart) in 'Galaxy Quest'.

A starship captain, a mystery-loving reporter, a candidate running for the Boston city council

Kate Mulgrew. Mulgrew played Capt. Janeway on 'Star Trek: Voyager', Kate Columbo on 'Kate Loves a Mystery', and guest character Janet Eldridge on three episodes of 'Cheers'.

A naive US Senator, a disgruntled Home and Loan officer, an alcoholic who sees an invisible rabbit

James Stewart & Jimmy Stewart & stewart. Stewart played Jefferson Smith in 'Mr. Smith Goes To Washington', George Bailey in 'It's a Wonderful Life', and Elwood Dowd in 'Harvey'.

A newspaper columnist who lives with his 'uncle', a reseach doctor who is accidentally radiation poisoned, a magician

Bill Bixby. Bixby played Tim O'Hara on 'My Favorite Martian' (with Ray Walston as Uncle Martin), Dr. David Banner on 'The Incredible Hulk', and Anthony Blake as the title character on 'The Magician'.

A magazine columnist, a prostitute whose best friend is a 'Pretty Woman', a woman who becomes Satan's bride after a disease ravages the Earth

Laura San Giacomo. Her characters are Maya Gallo on 'Just Shoot Me', Kit De Luca in 'Pretty Woman', and Nadine Cross in 'The Stand' (miniseries).

A time-travelling teenager, a deputy mayor, a professional bowler with a rich uncle

Michael J. Fox. Fox played Marty McFly in the 'Back to the Future' movies, Mike Flaherty on 'Spin City', and Daniel McTeague in 'Greedy'.

An American President, a San Francisco police inspector, a greedy stockbroker

Michael Douglas. Douglas played Pres. Andrew Shepherd in 'The American President', Inspector Steve Keller on 'The Streets of San Francisco', and Gordon Gekko in 'Wall Street'. Trivia: Actor Michael Keaton was born Michael John Douglas, but changed it to Keaton since Michael Douglas was already registered with the SAG. He picked the name after seeing a nice picture of Diane Keaton. (Coincidentally, Keaton isn't Diane's original last name either.)

A down-and-out baseball player who becomes a coach, a 12-year-old in a 30-year-old's body, a toy cowboy doll

Tom Hanks. Hanks played Jimmy Dugan in 'A League Of Their Own', Josh Baskin in 'Big', and Sheriff Woody in the 'Toy Story' movies.

A sheriff, a Hollywood police detective, a research scientist

Lyle Lovett. Lovett played Sheriff Carl Tippett in 'The Opposite of Sex', Det. DeLongpre in 'The Player', and a research scientist (no name given) in 'Breast Men'. He is also a Grammy-award winning singer-songwriter.

A college professor (later dean), an alien with a large head, a divorced mother who moves in with her also-divorced friend and her daughter.

Jane Curtin. Curtin played Mary Albright on 'Third Rock From The Sun', Prymatt Conehead in 'The Coneheads' and 'Saturday Night Live', and Allie Lowell in 'Kate and Allie'.

Adolf Hitler, a Russian general (Bond movie), an art dealer and drug smuggler

Steven Berkoff. Berkoff was Hitler in 'War and Remembrance' (mini-series), Gen. Orlov in 'Octopussy', and Victor Maitland in 'Beverly Hills Cop'.

A young Vulcan Starfleet officer, a bar manager, a single mother whose son thinks like Bruce Willis

Kirstie Alley. Alley played Saavik in 'Star Trek: The Wrath of Khan', Rebecca Howe on 'Cheers', and Mollie in the 'Look Who's Talking' movies.

A publicist for an NFL team, a neat-freak chef, an oceanographer

Courteney Cox. She's played Melissa Robinson in 'Ace Ventura: Pet Detective', Monica Geller Bing on 'Friends', and Sara in 'Cocoon: The Return'.

An absent-minded professor, a father of three sons, a father of a son who turns into a shaggy dog

Fred MacMurray & Fred McMurray & macmurray & mcmurray. MacMurray played Prof. Ned Brainard in 'The Absent-Minded Professor' (inventor of Flubber), Steve Douglas on 'My Three Sons', and Wilson Daniels in 'The Shaggy Dog'.