RiffTrax: Dr. Who Daleks' Invasion Earth 2150 A.D. is an absolute treat for sci-fi aficionados as it combines the wit and wisdom of universal space-time traveler, Dr. Who and the genius minds of the RiffTrax trio comprised of Michael J. Nelson, Kevin Murphy, and Bill Corbett - all created and performed by former Mystery Science Theater 3000 members.

Set amidst a dystopian London in the year 2150 A.D., the film starts with an everyday human being named Tom Campbell (played by Bernard Cribbins), who accidentally stumbles upon the iconic TARDIS, Dr. Who's time and space-travelling spaceship camouflaled as a 1960s London police box. He suddenly finds himself transported to a post-apocalyptic Earth, which has been invaded and is now under the control of the nefarious Daleks, the Doctor's arch-nemesis from the planet Skaro.

Peter Cushing, a renowned actor famed for his depiction of Hammer Horror, takes on the mantle of the enigmatic Dr. Who. Cushing brings a unique characteristic to the role of the Doctor, differentiated from the classic BBC series. Joined by two of his granddaughters, they embark on a desperate journey to rescue Tom, thwart the Dalek master plan, and ultimately save the Earth from its impending doom.

However, what differentiates this retelling from the original BBC series is the comedic commentary and jabs passed on by the RiffTrax crew. Michael J. Nelson, Kevin Murphy, and Bill Corbett take the stage to add their characteristic slant to this B-movie with humor, riffing, and effortless satire. Their playful and humorous narration unicornically transforms the apocalyptic plot into an unusually amusing sequence, making it a more enjoyable experience for those in the audience who might not be traditional Whovians.

The particular brand of parody brought by RiffTrax is an homage to their MST3K roots, preventing the film from ever taking itself too seriously. Their light-hearted mockery extends to the most mundane elements, from the oddly innovative but visibly aged special effects, to Cushing's eccentric performance, and even the Daleks' famous one-liners, converting a classic sci-fi adventure into a laugh-out-loud cinematic experience.

It's a journey through time and space, colored with a hefty dose of humor that RiffTrax is known for. Full of eccentric characters, laugh-out-loud moments, and witty criticism, this movie can give the original a run for its money. You don't have to be a superfan of Dr. Who to enjoy RiffTrax's wickedly funny take. Their comedic commentary ensures that there is enough hilarity and absurdity even in the tensest scenes to appeal to viewers who might not otherwise dabble in the realm of time-traveling extraterrestrials.

As the RiffTrax trio narrates the science fiction classic, the cinematic experience becomes a fresh and invigorating journey through the desolate future Earth. Their humorous quips alleviate the desperation permeating London's stark ruins and the oppressive Dalek rule, adding an unexpected dimension to the story. Even the most somber scenes are not safe from their combined wit.

Overall, RiffTrax: Dr. Who Daleks' Invasion Earth 2150 A.D. is a delightful concoction of nostalgia, rib-tickling commentary, and paradoxical cheer, which makes viewers appreciate the Dr. Who universe in an unexpected and fresh manner. The familiarity of the beloved classic, combined with the intelligent humor of Nelson, Murphy, and Corbett, turns this movie into pure, unadulterated entertainment. It's a glorious example of blending the past with the present to forge a new and engaging cinematic experience — a bumpy ride through time and space that's just too good to miss!