Speculation is rife as to who'll replace Jenna Coleman on Doctor Who - and Mark Gatiss has suggested a male companion would be "very interesting".
Coleman announced last month that the BBC sci-fi's current series will be her last as Clara Oswald.
"I've always been a fan of the boy/girl partnership from way back when," Gatiss told press at last night's (October 14) Attitude Awards.
"It would be very interesting if the Doctor had a male companion... but then it would be a very male show."
Gatiss, who has written episode nine of this latest Peter Capaldi-starring series, added he would be "delighted" if the Doctor became a woman in the future.
"I think the dynamic then would be really interesting," he suggested. "It would be great.
"Doctor Who is always driven on change. All you need is a fantastic actor for the part - but I hope Capaldi stays for a very long time because he's great."
Capaldi is currently tackling his second series as the Doctor, after making his debut in 2013.
"I think he's grown into it, which is what always happens," Gatiss said. "I love the way people have responded to this series, and I love the two-parters as well."
Doctor Who continues this Saturday (October 17) at 8.20pm on BBC One.
Watch the scary opening to Saturday night's Doctor Who below: